kb/data/developer.mozilla.org/en-US/docs/Glossary/Modem-1.md

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---
title: "Modem - Glossary | MDN"
chunk: 2/3
source: "https://developer.mozilla.org/en-US/docs/Glossary/Modem"
category: "reference"
tags: "web, html, css, javascript, documentation"
date_saved: "2026-05-05T05:38:04.880354+00:00"
instance: "kb-cron"
---
## Help improve MDN
[Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started)
This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Modem/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/modem/index.md?plain=1 "Folder: en-us/glossary/modem \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FModem&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fmodem%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FModem%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fmodem%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.")
1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary)
2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction)
2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent)
3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility)
4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree)
5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description)
6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name)
7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash)
8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure)
9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX)
10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm)
11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container)
12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject)
13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha)
14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN)
15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API)
16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari)
17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context)
18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument)
19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA)
20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA)
21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet)
22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array)
23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII)
24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio)
25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous)
26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG)
27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute)
28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication)
29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator)
30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth)
31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64)
32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline)
1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility)
2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography)
33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag)
34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon)
35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve)
36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache)
37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi)
38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt)
39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding)
40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags)
41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink)
42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element)
43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block)
1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS)
2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting)
44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation)
45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content)
46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean)
1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript)
2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA)
3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML)
47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box)
48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb)
49. [Brotli compression](https://developer.mozilla.org/en-US/docs/Glossary/Brotli_compression)
50. [Browser](https://developer.mozilla.org/en-US/docs/Glossary/Browser)
51. [Browsing context](https://developer.mozilla.org/en-US/docs/Glossary/Browsing_context)
52. [Buffer](https://developer.mozilla.org/en-US/docs/Glossary/Buffer)
53. [Bun](https://developer.mozilla.org/en-US/docs/Glossary/Bun)
54. [Cache](https://developer.mozilla.org/en-US/docs/Glossary/Cache)
55. [Cacheable](https://developer.mozilla.org/en-US/docs/Glossary/Cacheable)
56. [CalDAV](https://developer.mozilla.org/en-US/docs/Glossary/CalDAV)
57. [Call stack](https://developer.mozilla.org/en-US/docs/Glossary/Call_stack)
58. [Callback function](https://developer.mozilla.org/en-US/docs/Glossary/Callback_function)
59. [Camel case](https://developer.mozilla.org/en-US/docs/Glossary/Camel_case)
60. [Canonical order](https://developer.mozilla.org/en-US/docs/Glossary/Canonical_order)
61. [Canvas](https://developer.mozilla.org/en-US/docs/Glossary/Canvas)
62. [Card sorting](https://developer.mozilla.org/en-US/docs/Glossary/Card_sorting)
63. [CardDAV](https://developer.mozilla.org/en-US/docs/Glossary/CardDAV)
64. [Caret](https://developer.mozilla.org/en-US/docs/Glossary/Caret)
65. [CDN](https://developer.mozilla.org/en-US/docs/Glossary/CDN)
66. [Certificate authority](https://developer.mozilla.org/en-US/docs/Glossary/Certificate_authority)
67. [Certified](https://developer.mozilla.org/en-US/docs/Glossary/Certified)
68. [Challenge-response authentication](https://developer.mozilla.org/en-US/docs/Glossary/Challenge)
69. [Character](https://developer.mozilla.org/en-US/docs/Glossary/Character)
70. [Character encoding](https://developer.mozilla.org/en-US/docs/Glossary/Character_encoding)
71. [Character reference](https://developer.mozilla.org/en-US/docs/Glossary/Character_reference)
72. [Character set](https://developer.mozilla.org/en-US/docs/Glossary/Character_set)
73. [Chrome](https://developer.mozilla.org/en-US/docs/Glossary/Chrome)
74. [CIA](https://developer.mozilla.org/en-US/docs/Glossary/CIA)
75. [Cipher](https://developer.mozilla.org/en-US/docs/Glossary/Cipher)
76. [Cipher suite](https://developer.mozilla.org/en-US/docs/Glossary/Cipher_suite)
77. [Ciphertext](https://developer.mozilla.org/en-US/docs/Glossary/Ciphertext)
78. [Class](https://developer.mozilla.org/en-US/docs/Glossary/Class)
79. [Client-side rendering (CSR)](https://developer.mozilla.org/en-US/docs/Glossary/CSR)
80. [Closure](https://developer.mozilla.org/en-US/docs/Glossary/Closure)
81. [Cloud](https://developer.mozilla.org/en-US/docs/Glossary/Cloud)
82. [Cloud computing](https://developer.mozilla.org/en-US/docs/Glossary/Cloud_computing)
83. [CMS](https://developer.mozilla.org/en-US/docs/Glossary/CMS)
84. [Code point](https://developer.mozilla.org/en-US/docs/Glossary/Code_point)
85. [Code splitting](https://developer.mozilla.org/en-US/docs/Glossary/Code_splitting)
86. [Code unit](https://developer.mozilla.org/en-US/docs/Glossary/Code_unit)
87. [Codec](https://developer.mozilla.org/en-US/docs/Glossary/Codec)
88. [Color space](https://developer.mozilla.org/en-US/docs/Glossary/Color_space)
89. [Color wheel](https://developer.mozilla.org/en-US/docs/Glossary/Color_wheel)
90. [Compile](https://developer.mozilla.org/en-US/docs/Glossary/Compile)
91. [Compile time](https://developer.mozilla.org/en-US/docs/Glossary/Compile_time)
92. [Composite operation](https://developer.mozilla.org/en-US/docs/Glossary/Composite_operation)
93. [Compression Dictionary Transport](https://developer.mozilla.org/en-US/docs/Glossary/Compression_dictionary_transport)
94. [Computer programming](https://developer.mozilla.org/en-US/docs/Glossary/Computer_Programming)
95. [Conditional](https://developer.mozilla.org/en-US/docs/Glossary/Conditional)
96. [Constant](https://developer.mozilla.org/en-US/docs/Glossary/Constant)
97. [Constructor](https://developer.mozilla.org/en-US/docs/Glossary/Constructor)
98. [Content header](https://developer.mozilla.org/en-US/docs/Glossary/Content_header)
99. [Continuous integration](https://developer.mozilla.org/en-US/docs/Glossary/Continuous_integration)
100. [Continuous media](https://developer.mozilla.org/en-US/docs/Glossary/Continuous_Media)
101. [Control flow](https://developer.mozilla.org/en-US/docs/Glossary/Control_flow)
102. [Cookie](https://developer.mozilla.org/en-US/docs/Glossary/Cookie)
103. [Copyleft](https://developer.mozilla.org/en-US/docs/Glossary/Copyleft)
104. [CORS](https://developer.mozilla.org/en-US/docs/Glossary/CORS)
105. [CORS-safelisted request header](https://developer.mozilla.org/en-US/docs/Glossary/CORS-safelisted_request_header)
106. [CORS-safelisted response header](https://developer.mozilla.org/en-US/docs/Glossary/CORS-safelisted_response_header)
107. [Crawler](https://developer.mozilla.org/en-US/docs/Glossary/Crawler)
108. [Credential](https://developer.mozilla.org/en-US/docs/Glossary/Credential)
109. [CRLF](https://developer.mozilla.org/en-US/docs/Glossary/CRLF)
110. [Cross Axis](https://developer.mozilla.org/en-US/docs/Glossary/Cross_Axis)
111. [Cross-site request forgery (CSRF)](https://developer.mozilla.org/en-US/docs/Glossary/CSRF)
112. [Cross-site scripting (XSS)](https://developer.mozilla.org/en-US/docs/Glossary/Cross-site_scripting)
113. [CRUD](https://developer.mozilla.org/en-US/docs/Glossary/CRUD)
114. [Cryptanalysis](https://developer.mozilla.org/en-US/docs/Glossary/Cryptanalysis)
115. [Cryptography](https://developer.mozilla.org/en-US/docs/Glossary/Cryptography)
116. [CSP](https://developer.mozilla.org/en-US/docs/Glossary/CSP)
117. [CSS](https://developer.mozilla.org/en-US/docs/Glossary/CSS)
118. [CSS Object Model (CSSOM)](https://developer.mozilla.org/en-US/docs/Glossary/CSSOM)
119. [CSS pixel](https://developer.mozilla.org/en-US/docs/Glossary/CSS_pixel)
120. [CSS preprocessor](https://developer.mozilla.org/en-US/docs/Glossary/CSS_preprocessor)
121. [Cumulative Layout Shift (CLS)](https://developer.mozilla.org/en-US/docs/Glossary/CLS)
122. [Data structure](https://developer.mozilla.org/en-US/docs/Glossary/Data_structure)
123. [Database](https://developer.mozilla.org/en-US/docs/Glossary/Database)
124. [Debounce](https://developer.mozilla.org/en-US/docs/Glossary/Debounce)
125. [Decryption](https://developer.mozilla.org/en-US/docs/Glossary/Decryption)
126. [Deep copy](https://developer.mozilla.org/en-US/docs/Glossary/Deep_copy)
127. [Delta](https://developer.mozilla.org/en-US/docs/Glossary/Delta)
128. [Denial of Service (DoS)](https://developer.mozilla.org/en-US/docs/Glossary/Denial_of_Service)
129. [Deno](https://developer.mozilla.org/en-US/docs/Glossary/Deno)
130. [Descriptor (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Descriptor)
131. [Deserialization](https://developer.mozilla.org/en-US/docs/Glossary/Deserialization)
132. [Developer tools](https://developer.mozilla.org/en-US/docs/Glossary/Developer_Tools)
133. [Device pixel](https://developer.mozilla.org/en-US/docs/Glossary/Device_pixel)
134. [Digital certificate](https://developer.mozilla.org/en-US/docs/Glossary/Digital_certificate)
135. [Digital signature](https://developer.mozilla.org/en-US/docs/Glossary/Digital_signature)
136. [Distributed Denial of Service (DDoS)](https://developer.mozilla.org/en-US/docs/Glossary/Distributed_Denial_of_Service)
137. [DMZ](https://developer.mozilla.org/en-US/docs/Glossary/DMZ)
138. [DNS](https://developer.mozilla.org/en-US/docs/Glossary/DNS)
139. [Doctype](https://developer.mozilla.org/en-US/docs/Glossary/Doctype)
140. [Document directive](https://developer.mozilla.org/en-US/docs/Glossary/Document_directive)
141. [Document environment](https://developer.mozilla.org/en-US/docs/Glossary/Document_environment)
142. [DOM (Document Object Model)](https://developer.mozilla.org/en-US/docs/Glossary/DOM)
143. [Domain](https://developer.mozilla.org/en-US/docs/Glossary/Domain)
144. [Domain name](https://developer.mozilla.org/en-US/docs/Glossary/Domain_name)
145. [Domain sharding](https://developer.mozilla.org/en-US/docs/Glossary/Domain_sharding)
146. [Dominator](https://developer.mozilla.org/en-US/docs/Glossary/Dominator)
147. [DSL](https://developer.mozilla.org/en-US/docs/Glossary/DSL)
1. [DSL (Digital Subscriber Line)](https://developer.mozilla.org/en-US/docs/Glossary/DSL/Digital_subscriber_line)
2. [DSL (Domain-Specific Language)](https://developer.mozilla.org/en-US/docs/Glossary/DSL/Domain_specific_language)
148. [DTLS (Datagram Transport Layer Security)](https://developer.mozilla.org/en-US/docs/Glossary/DTLS)
149. [DTMF (Dual-Tone Multi-Frequency signaling)](https://developer.mozilla.org/en-US/docs/Glossary/DTMF)
150. [Dynamic typing](https://developer.mozilla.org/en-US/docs/Glossary/Dynamic_typing)
151. [ECMA](https://developer.mozilla.org/en-US/docs/Glossary/ECMA)
152. [ECMAScript](https://developer.mozilla.org/en-US/docs/Glossary/ECMAScript)
153. [Effective connection type](https://developer.mozilla.org/en-US/docs/Glossary/Effective_connection_type)
154. [Element](https://developer.mozilla.org/en-US/docs/Glossary/Element)
155. [Encapsulation](https://developer.mozilla.org/en-US/docs/Glossary/Encapsulation)
156. [Encryption](https://developer.mozilla.org/en-US/docs/Glossary/Encryption)
157. [Endianness](https://developer.mozilla.org/en-US/docs/Glossary/Endianness)
158. [Engine](https://developer.mozilla.org/en-US/docs/Glossary/Engine)
1. [JavaScript engine](https://developer.mozilla.org/en-US/docs/Glossary/Engine/JavaScript)
2. [Rendering engine](https://developer.mozilla.org/en-US/docs/Glossary/Engine/Rendering)
159. [Entity](https://developer.mozilla.org/en-US/docs/Glossary/Entity)
160. [Entity header](https://developer.mozilla.org/en-US/docs/Glossary/Entity_header)
161. [Enumerated](https://developer.mozilla.org/en-US/docs/Glossary/Enumerated)
162. [Escape character](https://developer.mozilla.org/en-US/docs/Glossary/Escape_character)
163. [Event](https://developer.mozilla.org/en-US/docs/Glossary/Event)
164. [Exception](https://developer.mozilla.org/en-US/docs/Glossary/Exception)
165. [EXIF](https://developer.mozilla.org/en-US/docs/Glossary/EXIF)
166. [Expando](https://developer.mozilla.org/en-US/docs/Glossary/Expando)
167. [Extrinsic size](https://developer.mozilla.org/en-US/docs/Glossary/Extrinsic_size)
168. [Fallback alignment](https://developer.mozilla.org/en-US/docs/Glossary/Fallback_Alignment)
169. [Falsy](https://developer.mozilla.org/en-US/docs/Glossary/Falsy)
170. [Favicon](https://developer.mozilla.org/en-US/docs/Glossary/Favicon)
171. [Federated identity](https://developer.mozilla.org/en-US/docs/Glossary/Federated_identity)
172. [Fetch directive](https://developer.mozilla.org/en-US/docs/Glossary/Fetch_directive)
173. [Fetch metadata request header](https://developer.mozilla.org/en-US/docs/Glossary/Fetch_metadata_request_header)
174. [Fingerprinting](https://developer.mozilla.org/en-US/docs/Glossary/Fingerprinting)
175. [Firefox OS](https://developer.mozilla.org/en-US/docs/Glossary/Firefox_OS)
176. [Firewall](https://developer.mozilla.org/en-US/docs/Glossary/Firewall)
177. [First Contentful Paint (FCP)](https://developer.mozilla.org/en-US/docs/Glossary/First_contentful_paint)
178. [First CPU idle](https://developer.mozilla.org/en-US/docs/Glossary/First_CPU_idle)
179. [First Input Delay (FID)](https://developer.mozilla.org/en-US/docs/Glossary/First_input_delay)
180. [First Meaningful Paint (FMP)](https://developer.mozilla.org/en-US/docs/Glossary/First_meaningful_paint)
181. [First Paint (FP)](https://developer.mozilla.org/en-US/docs/Glossary/First_paint)
182. [First-class function](https://developer.mozilla.org/en-US/docs/Glossary/First-class_Function)
183. [Flex](https://developer.mozilla.org/en-US/docs/Glossary/Flex)
184. [Flex container](https://developer.mozilla.org/en-US/docs/Glossary/Flex_Container)
185. [Flex item](https://developer.mozilla.org/en-US/docs/Glossary/Flex_Item)
186. [Flexbox](https://developer.mozilla.org/en-US/docs/Glossary/Flexbox)
187. [Flow relative values](https://developer.mozilla.org/en-US/docs/Glossary/Flow_relative_values)
188. [Forbidden request header](https://developer.mozilla.org/en-US/docs/Glossary/Forbidden_request_header)
189. [Forbidden response header name](https://developer.mozilla.org/en-US/docs/Glossary/Forbidden_response_header_name)
190. [Fork](https://developer.mozilla.org/en-US/docs/Glossary/Fork)
191. [Fragmentainer](https://developer.mozilla.org/en-US/docs/Glossary/Fragmentainer)
192. [Frame rate (FPS)](https://developer.mozilla.org/en-US/docs/Glossary/FPS)
193. [FTP](https://developer.mozilla.org/en-US/docs/Glossary/FTP)
194. [FTU](https://developer.mozilla.org/en-US/docs/Glossary/FTU)
195. [Function](https://developer.mozilla.org/en-US/docs/Glossary/Function)
196. [Fuzz testing](https://developer.mozilla.org/en-US/docs/Glossary/Fuzzing)
197. [Gamut](https://developer.mozilla.org/en-US/docs/Glossary/Gamut)
198. [Garbage collection](https://developer.mozilla.org/en-US/docs/Glossary/Garbage_collection)
199. [Gecko](https://developer.mozilla.org/en-US/docs/Glossary/Gecko)
200. [General header](https://developer.mozilla.org/en-US/docs/Glossary/General_header)
201. [GIF](https://developer.mozilla.org/en-US/docs/Glossary/GIF)
202. [Git](https://developer.mozilla.org/en-US/docs/Glossary/Git)
203. [Global object](https://developer.mozilla.org/en-US/docs/Glossary/Global_object)
204. [Global scope](https://developer.mozilla.org/en-US/docs/Glossary/Global_scope)
205. [Global variable](https://developer.mozilla.org/en-US/docs/Glossary/Global_variable)
206. [Glyph](https://developer.mozilla.org/en-US/docs/Glossary/Glyph)
207. [Google Chrome](https://developer.mozilla.org/en-US/docs/Glossary/Google_Chrome)
208. [GPL](https://developer.mozilla.org/en-US/docs/Glossary/GPL)
209. [GPU](https://developer.mozilla.org/en-US/docs/Glossary/GPU)
210. [Graceful degradation](https://developer.mozilla.org/en-US/docs/Glossary/Graceful_degradation)
211. [Grid](https://developer.mozilla.org/en-US/docs/Glossary/Grid)
212. [Grid areas](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Areas)
213. [Grid Axis](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Axis)
214. [Grid Cell](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Cell)
215. [Grid Column](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Column)
216. [Grid container](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Container)
217. [Grid lines](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Lines)
218. [Grid Row](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Row)
219. [Grid Tracks](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Tracks)
220. [Guaranteed-invalid value](https://developer.mozilla.org/en-US/docs/Glossary/guaranteed_invalid_value)
221. [Gutters](https://developer.mozilla.org/en-US/docs/Glossary/Gutters)
222. [gzip compression](https://developer.mozilla.org/en-US/docs/Glossary/gzip_compression)
223. [Hash function](https://developer.mozilla.org/en-US/docs/Glossary/Hash_function)
224. [Hash routing](https://developer.mozilla.org/en-US/docs/Glossary/Hash_routing)
225. [Head](https://developer.mozilla.org/en-US/docs/Glossary/Head)
226. [High-level programming language](https://developer.mozilla.org/en-US/docs/Glossary/High-level_programming_language)
227. [HMAC](https://developer.mozilla.org/en-US/docs/Glossary/HMAC)
228. [Hoisting](https://developer.mozilla.org/en-US/docs/Glossary/Hoisting)
229. [HOL blocking](https://developer.mozilla.org/en-US/docs/Glossary/Head_of_line_blocking)
230. [Host](https://developer.mozilla.org/en-US/docs/Glossary/Host)
231. [Hotlink](https://developer.mozilla.org/en-US/docs/Glossary/Hotlink)
232. [Houdini](https://developer.mozilla.org/en-US/docs/Glossary/Houdini)
233. [HPKP](https://developer.mozilla.org/en-US/docs/Glossary/HPKP)
234. [HSTS](https://developer.mozilla.org/en-US/docs/Glossary/HSTS)
235. [HTML](https://developer.mozilla.org/en-US/docs/Glossary/HTML)
236. [HTML color codes](https://developer.mozilla.org/en-US/docs/Glossary/html_color_codes)
237. [HTML5](https://developer.mozilla.org/en-US/docs/Glossary/HTML5)
238. [HTTP](https://developer.mozilla.org/en-US/docs/Glossary/HTTP)
239. [HTTP content](https://developer.mozilla.org/en-US/docs/Glossary/HTTP_Content)
240. [HTTP header](https://developer.mozilla.org/en-US/docs/Glossary/HTTP_header)
241. [HTTP/2](https://developer.mozilla.org/en-US/docs/Glossary/HTTP_2)
242. [HTTP/3](https://developer.mozilla.org/en-US/docs/Glossary/HTTP_3)
243. [HTTPS](https://developer.mozilla.org/en-US/docs/Glossary/HTTPS)
244. [HTTPS RR](https://developer.mozilla.org/en-US/docs/Glossary/HTTPS_RR)
245. [Hyperlink](https://developer.mozilla.org/en-US/docs/Glossary/Hyperlink)
246. [Hypertext](https://developer.mozilla.org/en-US/docs/Glossary/Hypertext)
247. [IANA](https://developer.mozilla.org/en-US/docs/Glossary/IANA)
248. [ICANN](https://developer.mozilla.org/en-US/docs/Glossary/ICANN)
249. [ICE](https://developer.mozilla.org/en-US/docs/Glossary/ICE)
250. [IDE](https://developer.mozilla.org/en-US/docs/Glossary/IDE)
251. [Idempotent](https://developer.mozilla.org/en-US/docs/Glossary/Idempotent)
252. [Identifier](https://developer.mozilla.org/en-US/docs/Glossary/Identifier)
253. [Identity provider (IdP)](https://developer.mozilla.org/en-US/docs/Glossary/Identity_provider)
254. [IDL](https://developer.mozilla.org/en-US/docs/Glossary/IDL)
255. [IETF](https://developer.mozilla.org/en-US/docs/Glossary/IETF)
256. [IIFE](https://developer.mozilla.org/en-US/docs/Glossary/IIFE)
257. [IMAP](https://developer.mozilla.org/en-US/docs/Glossary/IMAP)
258. [Immutable](https://developer.mozilla.org/en-US/docs/Glossary/Immutable)
259. [IndexedDB](https://developer.mozilla.org/en-US/docs/Glossary/IndexedDB)
260. [Information architecture](https://developer.mozilla.org/en-US/docs/Glossary/Information_architecture)
261. [Inheritance](https://developer.mozilla.org/en-US/docs/Glossary/Inheritance)
262. [Ink overflow](https://developer.mozilla.org/en-US/docs/Glossary/Ink_overflow)
263. [Inline-level content](https://developer.mozilla.org/en-US/docs/Glossary/Inline-level_content)
264. [Input method editor](https://developer.mozilla.org/en-US/docs/Glossary/Input_method_editor)
265. [Inset properties](https://developer.mozilla.org/en-US/docs/Glossary/Inset_properties)
266. [Instance](https://developer.mozilla.org/en-US/docs/Glossary/Instance)
267. [Interaction to Next Paint (INP)](https://developer.mozilla.org/en-US/docs/Glossary/Interaction_to_next_paint)
268. [Internationalization (i18n)](https://developer.mozilla.org/en-US/docs/Glossary/Internationalization)
269. [Internet](https://developer.mozilla.org/en-US/docs/Glossary/Internet)
270. [Interpolation](https://developer.mozilla.org/en-US/docs/Glossary/Interpolation)
271. [Intrinsic size](https://developer.mozilla.org/en-US/docs/Glossary/Intrinsic_Size)
272. [Invariant](https://developer.mozilla.org/en-US/docs/Glossary/Invariant)
273. [IP Address](https://developer.mozilla.org/en-US/docs/Glossary/IP_Address)
274. [IPv4](https://developer.mozilla.org/en-US/docs/Glossary/IPv4)
275. [IPv6](https://developer.mozilla.org/en-US/docs/Glossary/IPv6)
276. [IRC](https://developer.mozilla.org/en-US/docs/Glossary/IRC)
277. [ISO](https://developer.mozilla.org/en-US/docs/Glossary/ISO)
278. [ISP](https://developer.mozilla.org/en-US/docs/Glossary/ISP)
279. [ITU](https://developer.mozilla.org/en-US/docs/Glossary/ITU)
280. [Jank](https://developer.mozilla.org/en-US/docs/Glossary/Jank)
281. [Java](https://developer.mozilla.org/en-US/docs/Glossary/Java)
282. [JavaScript](https://developer.mozilla.org/en-US/docs/Glossary/JavaScript)
283. [Jitter](https://developer.mozilla.org/en-US/docs/Glossary/Jitter)
284. [JPEG](https://developer.mozilla.org/en-US/docs/Glossary/JPEG)
285. [JSON](https://developer.mozilla.org/en-US/docs/Glossary/JSON)
286. [JSON type representation](https://developer.mozilla.org/en-US/docs/Glossary/JSON_type_representation)
287. [Just-In-Time Compilation (JIT)](https://developer.mozilla.org/en-US/docs/Glossary/Just_In_Time_Compilation)
288. [Kebab case](https://developer.mozilla.org/en-US/docs/Glossary/Kebab_case)
289. [Key](https://developer.mozilla.org/en-US/docs/Glossary/Key)
290. [Keyword](https://developer.mozilla.org/en-US/docs/Glossary/Keyword)
291. [Largest Contentful Paint (LCP)](https://developer.mozilla.org/en-US/docs/Glossary/Largest_contentful_paint)
292. [Latency](https://developer.mozilla.org/en-US/docs/Glossary/Latency)
293. [Layout mode](https://developer.mozilla.org/en-US/docs/Glossary/Layout_mode)
294. [Layout viewport](https://developer.mozilla.org/en-US/docs/Glossary/Layout_viewport)
295. [Lazy load](https://developer.mozilla.org/en-US/docs/Glossary/Lazy_load)
296. [Leading](https://developer.mozilla.org/en-US/docs/Glossary/Leading)
297. [LGPL](https://developer.mozilla.org/en-US/docs/Glossary/LGPL)
298. [Ligature](https://developer.mozilla.org/en-US/docs/Glossary/Ligature)
299. [Literal](https://developer.mozilla.org/en-US/docs/Glossary/Literal)
300. [Local scope](https://developer.mozilla.org/en-US/docs/Glossary/Local_scope)
301. [Local variable](https://developer.mozilla.org/en-US/docs/Glossary/Local_variable)
302. [Locale](https://developer.mozilla.org/en-US/docs/Glossary/Locale)
303. [Localization](https://developer.mozilla.org/en-US/docs/Glossary/Localization)
304. [Logical properties](https://developer.mozilla.org/en-US/docs/Glossary/Logical_properties)
305. [Long task](https://developer.mozilla.org/en-US/docs/Glossary/Long_task)
306. [Loop](https://developer.mozilla.org/en-US/docs/Glossary/Loop)
307. [Lossless compression](https://developer.mozilla.org/en-US/docs/Glossary/Lossless_compression)
308. [Lossy compression](https://developer.mozilla.org/en-US/docs/Glossary/Lossy_compression)
309. [LTR (Left To Right)](https://developer.mozilla.org/en-US/docs/Glossary/LTR)
310. [Main axis](https://developer.mozilla.org/en-US/docs/Glossary/Main_Axis)
311. [Main thread](https://developer.mozilla.org/en-US/docs/Glossary/Main_thread)
312. [Markup](https://developer.mozilla.org/en-US/docs/Glossary/Markup)
313. [MathML](https://developer.mozilla.org/en-US/docs/Glossary/MathML)
314. [Media](https://developer.mozilla.org/en-US/docs/Glossary/Media)
1. [Media (Audio-visual presentation)](https://developer.mozilla.org/en-US/docs/Glossary/Media/Audio-visual_presentation)
2. [Media (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Media/CSS)
315. [Media query](https://developer.mozilla.org/en-US/docs/Glossary/Media_query)
316. [Metadata](https://developer.mozilla.org/en-US/docs/Glossary/Metadata)
317. [Method](https://developer.mozilla.org/en-US/docs/Glossary/Method)
318. [Microsoft Edge](https://developer.mozilla.org/en-US/docs/Glossary/Microsoft_Edge)
319. [Microsoft Internet Explorer](https://developer.mozilla.org/en-US/docs/Glossary/Microsoft_Internet_Explorer)
320. [Middleware](https://developer.mozilla.org/en-US/docs/Glossary/Middleware)
321. [MIME](https://developer.mozilla.org/en-US/docs/Glossary/MIME)
322. [MIME type](https://developer.mozilla.org/en-US/docs/Glossary/MIME_type)
323. [Minification](https://developer.mozilla.org/en-US/docs/Glossary/Minification)
324. [MitM](https://developer.mozilla.org/en-US/docs/Glossary/MitM)
325. [Mixin](https://developer.mozilla.org/en-US/docs/Glossary/Mixin)
326. [Mobile first](https://developer.mozilla.org/en-US/docs/Glossary/Mobile_First)
327. _[Modem](https://developer.mozilla.org/en-US/docs/Glossary/Modem)_
328. [Modularity](https://developer.mozilla.org/en-US/docs/Glossary/Modularity)
329. [Mozilla Firefox](https://developer.mozilla.org/en-US/docs/Glossary/Mozilla_Firefox)
330. [Multi-factor authentication](https://developer.mozilla.org/en-US/docs/Glossary/Multi-factor_authentication)
331. [Mutable](https://developer.mozilla.org/en-US/docs/Glossary/Mutable)
332. [MVC](https://developer.mozilla.org/en-US/docs/Glossary/MVC)
333. [Namespace](https://developer.mozilla.org/en-US/docs/Glossary/Namespace)
334. [NaN](https://developer.mozilla.org/en-US/docs/Glossary/NaN)
335. [NAT](https://developer.mozilla.org/en-US/docs/Glossary/NAT)
336. [Native](https://developer.mozilla.org/en-US/docs/Glossary/Native)
337. [Navigation directive](https://developer.mozilla.org/en-US/docs/Glossary/Navigation_directive)
338. [Netscape Navigator](https://developer.mozilla.org/en-US/docs/Glossary/Netscape_Navigator)
339. [Network throttling](https://developer.mozilla.org/en-US/docs/Glossary/Network_throttling)
340. [NNTP](https://developer.mozilla.org/en-US/docs/Glossary/NNTP)
341. [Node](https://developer.mozilla.org/en-US/docs/Glossary/Node)
1. [Node (DOM)](https://developer.mozilla.org/en-US/docs/Glossary/Node/DOM)
2. [Node (networking)](https://developer.mozilla.org/en-US/docs/Glossary/Node/networking)
342. [Node.js](https://developer.mozilla.org/en-US/docs/Glossary/Node.js)
343. [Non-normative](https://developer.mozilla.org/en-US/docs/Glossary/Non-normative)
344. [Nonce](https://developer.mozilla.org/en-US/docs/Glossary/Nonce)
345. [Normative](https://developer.mozilla.org/en-US/docs/Glossary/Normative)
346. [Null](https://developer.mozilla.org/en-US/docs/Glossary/Null)
347. [Nullish value](https://developer.mozilla.org/en-US/docs/Glossary/Nullish)
348. [Number](https://developer.mozilla.org/en-US/docs/Glossary/Number)
349. [Object](https://developer.mozilla.org/en-US/docs/Glossary/Object)
350. [Object reference](https://developer.mozilla.org/en-US/docs/Glossary/Object_reference)
351. [OOP](https://developer.mozilla.org/en-US/docs/Glossary/OOP)
352. [OpenGL](https://developer.mozilla.org/en-US/docs/Glossary/OpenGL)
353. [OpenSSL](https://developer.mozilla.org/en-US/docs/Glossary/OpenSSL)
354. [Opera browser](https://developer.mozilla.org/en-US/docs/Glossary/Opera_Browser)
355. [Operand](https://developer.mozilla.org/en-US/docs/Glossary/Operand)
356. [Operator](https://developer.mozilla.org/en-US/docs/Glossary/Operator)
357. [Origin](https://developer.mozilla.org/en-US/docs/Glossary/Origin)
358. [OTA](https://developer.mozilla.org/en-US/docs/Glossary/OTA)
359. [OWASP](https://developer.mozilla.org/en-US/docs/Glossary/OWASP)
360. [P2P](https://developer.mozilla.org/en-US/docs/Glossary/P2P)
361. [PAC](https://developer.mozilla.org/en-US/docs/Glossary/PAC)
362. [Packet](https://developer.mozilla.org/en-US/docs/Glossary/Packet)
363. [Page load time](https://developer.mozilla.org/en-US/docs/Glossary/Page_load_time)
364. [Page prediction](https://developer.mozilla.org/en-US/docs/Glossary/Page_prediction)
365. [Parameter](https://developer.mozilla.org/en-US/docs/Glossary/Parameter)
366. [Parent object](https://developer.mozilla.org/en-US/docs/Glossary/Parent_object)
367. [Parse](https://developer.mozilla.org/en-US/docs/Glossary/Parse)
368. [Parser](https://developer.mozilla.org/en-US/docs/Glossary/Parser)
369. [Payload body](https://developer.mozilla.org/en-US/docs/Glossary/Payload_body)
370. [Payload header](https://developer.mozilla.org/en-US/docs/Glossary/Payload_header)
371. [PDF](https://developer.mozilla.org/en-US/docs/Glossary/PDF)
372. [Perceived performance](https://developer.mozilla.org/en-US/docs/Glossary/Perceived_performance)
373. [Percent-encoding](https://developer.mozilla.org/en-US/docs/Glossary/Percent-encoding)
374. [PHP](https://developer.mozilla.org/en-US/docs/Glossary/PHP)
375. [Physical properties](https://developer.mozilla.org/en-US/docs/Glossary/Physical_properties)
376. [Pixel](https://developer.mozilla.org/en-US/docs/Glossary/Pixel)
377. [Placeholder names](https://developer.mozilla.org/en-US/docs/Glossary/Placeholder_names)
378. [Plaintext](https://developer.mozilla.org/en-US/docs/Glossary/Plaintext)
379. [Plugin](https://developer.mozilla.org/en-US/docs/Glossary/Plugin)
380. [PNG](https://developer.mozilla.org/en-US/docs/Glossary/PNG)
381. [Polyfill](https://developer.mozilla.org/en-US/docs/Glossary/Polyfill)
382. [Polymorphism](https://developer.mozilla.org/en-US/docs/Glossary/Polymorphism)
383. [POP3](https://developer.mozilla.org/en-US/docs/Glossary/POP)
384. [Port](https://developer.mozilla.org/en-US/docs/Glossary/Port)
385. [Prefetch](https://developer.mozilla.org/en-US/docs/Glossary/Prefetch)
386. [Preflight request](https://developer.mozilla.org/en-US/docs/Glossary/Preflight_request)
387. [Prerender](https://developer.mozilla.org/en-US/docs/Glossary/Prerender)
388. [Presto](https://developer.mozilla.org/en-US/docs/Glossary/Presto)
389. [Primitive](https://developer.mozilla.org/en-US/docs/Glossary/Primitive)
390. [Principle of least privilege](https://developer.mozilla.org/en-US/docs/Glossary/Principle_of_least_privilege)
391. [Privileged](https://developer.mozilla.org/en-US/docs/Glossary/Privileged)
392. [Privileged code](https://developer.mozilla.org/en-US/docs/Glossary/Privileged_code)
393. [Progressive enhancement](https://developer.mozilla.org/en-US/docs/Glossary/Progressive_Enhancement)
394. [Progressive web applications (PWAs)](https://developer.mozilla.org/en-US/docs/Glossary/Progressive_web_apps)
395. [Promise](https://developer.mozilla.org/en-US/docs/Glossary/Promise)
396. [Property](https://developer.mozilla.org/en-US/docs/Glossary/Property)
1. [Property (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Property/CSS)
2. [Property (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Property/JavaScript)
397. [Protocol](https://developer.mozilla.org/en-US/docs/Glossary/Protocol)
398. [Prototype](https://developer.mozilla.org/en-US/docs/Glossary/Prototype)
399. [Prototype-based programming](https://developer.mozilla.org/en-US/docs/Glossary/Prototype-based_programming)
400. [Proxy server](https://developer.mozilla.org/en-US/docs/Glossary/Proxy_server)
401. [Pseudo-class](https://developer.mozilla.org/en-US/docs/Glossary/Pseudo-class)
402. [Pseudo-element](https://developer.mozilla.org/en-US/docs/Glossary/Pseudo-element)
403. [Pseudocode](https://developer.mozilla.org/en-US/docs/Glossary/Pseudocode)
404. [Public-key cryptography](https://developer.mozilla.org/en-US/docs/Glossary/Public-key_cryptography)
405. [Python](https://developer.mozilla.org/en-US/docs/Glossary/Python)
406. [Quality values](https://developer.mozilla.org/en-US/docs/Glossary/Quality_values)
407. [Quaternion](https://developer.mozilla.org/en-US/docs/Glossary/Quaternion)
408. [QUIC](https://developer.mozilla.org/en-US/docs/Glossary/QUIC)
409. [RAIL](https://developer.mozilla.org/en-US/docs/Glossary/RAIL)
410. [Random Number Generator](https://developer.mozilla.org/en-US/docs/Glossary/RNG)
411. [Raster image](https://developer.mozilla.org/en-US/docs/Glossary/Raster_image)
412. [Rate limit](https://developer.mozilla.org/en-US/docs/Glossary/Rate_limit)
413. [RDF](https://developer.mozilla.org/en-US/docs/Glossary/RDF)
414. [Reading order](https://developer.mozilla.org/en-US/docs/Glossary/Reading_order)
415. [Real User Monitoring (RUM)](https://developer.mozilla.org/en-US/docs/Glossary/Real_User_Monitoring)
416. [Recursion](https://developer.mozilla.org/en-US/docs/Glossary/Recursion)
417. [Reflow](https://developer.mozilla.org/en-US/docs/Glossary/Reflow)
418. [Registrable domain](https://developer.mozilla.org/en-US/docs/Glossary/Registrable_domain)
419. [Regular expression](https://developer.mozilla.org/en-US/docs/Glossary/Regular_expression)
420.