1. ADSL = Asymmetric Digital Subscriber Line
  2. AJAX = Asymmetric JavaScript and XML
  3. ARPANET = Advanced Research Projects Agency Network
  4. CDMA = Code Division Multiple Access
  5. CDN = Content Delivery Network
  6. CMS = Content Management System (such as Drupal, Joomla! or Wordpress)
  7. CSS = Cascading Style Sheets
  8. CSV = Comma Separated Values
  9. DHTML = Dynamic HTML
  10. DNS = Domain Name Server or Domain Name Service or Domain Name System
  11. DOM = Document Object Model
  12. DTD = Document Type Definition
  13. ECMA = European Computer Manufacturers Association
  14. FQDN = Fully Qualified Domain Name
  15. FTP = File Transfer Protocol
  16. FTTP = Fiber to the Premises
  17. GSM = Global System for Mobile communications
  18. HTML = HyperText Markup Language
  19. HTTP = HyperText Transfer Protocol
  20. IETF = Internet Engineering Task Force
  21. ISDN = Integrated Services Digital Network
  22. JSON = JavaScript Object Notation
  23. LoVeHAte = LVHA (for remembering the required order of CSS pseudo-classes :link, :visited, :hover, and :active)
  24. MIME = Multipurpose Internet Mail Extension
  25. PHP = PHP: Hypertext Preprocessor (formerly Personal Home Page)
  26. RFC = Request For Comment
  27. SSH = Secure SHell
  28. SSI = Server Side Include(s)
  29. SGML = Standard Generalized Markup Language
  30. SQL = Structured Query Language
  31. TCP/IP = Transmission Control Protocol/Internet Protocol
  32. Telnet = Telephone network or Telecommunications network
  33. TRouBLe = Top Right Bottom Left (for remembering the correct order of CSS shortcut properties)
  34. UCS = Universal Character Set
  35. UDP = User Datagram Protocol
  36. URI = Uniform Resource Identifier
  37. URN = Uniform Resource Name
  38. URL = Uniform Resource Locator
  39. UTF (as in utf-8) = Unicode Transformation Format
  40. W3C = World Wide Web Consortium
  41. WiMAX = Worldwide interoperability for Microwave Access (not exactly an acronym ...)
  42. WWW = World Wide Web
  43. WYSIWYG = What You See Is What You Get
  44. XHTML = eXtensible HyperText Markup Language
  45. XML = eXtensible Markup Language
  46. XSL = eXtensible Stylesheet Language
  47. XSLT = eXtensible Stylesheet Language Transformation