.z        Packed file (file name extension - using Pack/Unpack
          program)..lower case z..[Unix]
.Z        Compressed file (file name extension - using
          Compress/Uncompress program)..upper case Z..[Unix]
ZBR       Zone Bit Recording
Z-CAV     Zoned Constant Angular Velocity
ZDL       Zero Delay Lockout
ZDS       Zenith Data Systems
ZIF       Zero-Insertion Force (socket)
ZIP       Zigzag In-Line Package ,
          Zone Improvement Plan (ZIPcode)
.ZIP      Compressed File (file name extension) [PKWare]
.ZOO      Compressed File (file name extension) [Dhesi]
ZPV       Zoomed Port Video [Toshiba]
ZSL       Zero Slot LAN
~         Tilde
*         Wildcard character (asterisk)
*.*       Star-Dot-Star (represents
          Any file name.Any file name extension)
.$$$      Temporary File (file name extension)
286       80286 (microprocessor)
386       80386 (microprocessor)
3COM      3 Com Corporation (The 3 Coms are
          Computer, Communications and Compatability)
3GL       Third Generation Language (procedural language)
486       80486 (microprocessor)
4GL       Fourth Generation Language (procedural language)
6DOF      Six Degrees Of Freedom