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v AC : Alternating current v ALU : Arithmetic and logical unit v CD-RW : compact disk re-writable v BIOS : basic input and output system v CPU : central processing unit v FDD : floppy disk drive v HDD : hard disk drive v MS : Microsoft v MS-DOS : Microsoft disk operating system v PC : personal computer v ROM : read only memory v RAM : random access memory v DVD : digital video disk v CU : control unit v ISP : internet service provider v WWW : world wide web v LCD : liquid crystal display v NTFS : network transfer file system v USB : universal serial bus v XT : extended technology v