CPU stands for

  Processor
  Central Processing Unit
  Computer Power Unit
  Cyclic Peripheral Unit

DVD stands for

  Disposable Video Disk
  Decompressed Video Data
  Digital Versatile Disc
  Dynamic Video Disk

RAM stands for

  Random Access Memory
  Redundant Allocation Module
  Reload Alternate Memory
  Random Access Module

USB stands for

  Undercurrent Survival Battery
  Unified Service Backup
  Unified Service Bus
  Universal Serial Bus

HTTP stands for

  Hardcoded TCP/IP Technical Protocol
  Heavy Text Transfer Protocol
  Hyper Transfer TCP/IP Protocol
  Hyper Text Transfer Protocol

WWW stands for

  Wicked Water World
  Wired World Web
  World Wide Web
  Willy Wanka Water Mellon

URL stands for

  Understood Registered Link
  Universal Relocated Link
  User Resource Link
  Uniform Resource Locator

FTP stands for

  Fast Transfer Protocol
  File Transfer Protocol
  Format Technology Program
  Flux Turbo Protocol

DSL stands for

  Dynamic System Layer
  Digital Secure Line
  Digital Subscriber Line
  Data Service Line

DOS stands for

  Default Operating System
  Disk Operating System
  Dynamic Operating System
  Drive Operating System

.dll stans for

  Default Link Line
  Default Linux Library
  Dynamic Linux Link
  Dynamic Link Library

TCP/IP stands for

  Transmission Control Protocol / Internet Protocol
  Trusted Computer Process / Internet Protocol
  Transfer Control Process / Integrated Peripheral
  Timed Console Program / Intelligent Process

Lan stands for

  Local Access Network
  Linked Area Network
  Local Area Network
  Linux Area Network

WAN stands for

  World Area Network
  Wide Area Network
  Wired Area Network
  Windows Area Network