Abbreviation | Full name  | Explanation  | 
  | 
  | 
  | 
TCP/IP | Transmission Control  | Suite of programs for  | 
  | Program/Internet  | network communication.  | 
  | Protocol  | TCP/IP can be installed  | 
  | 
  | on almost every existing  | 
  | 
  | operating system, but the  | 
  | 
  | supported functions vary  | 
  | 
  | between operating  | 
  | 
  | systems. TCP/IP consist  | 
  | 
  | of a base TCP program  | 
  | 
  | and various other  | 
  | 
  | programs providing  | 
  | 
  | support for e.g. LPD,  | 
  | 
  | Telnet or BootP.  | 
  | 
  | 
  | 
VTAM  | Virtual TeleAccess  | IBM network  | 
  | Method  | communcation program.  | 
  | 
  | VTAM is used to connect  | 
  | 
  | printers and terminals to  | 
  | 
  | OS/390 (MVS) and VM  | 
  | 
  | systems.  | 
  | 
  | 
  | 
VM  | Virtual Machine  | IBM operating system for  | 
  | 
  | mainframes. OS/390  | 
  | 
  | (MVS) and other  | 
  | 
  | operating systems can  | 
  | 
  | run under control of VM.  | 
  | 
  | 
  | 
WAN | Wide Area Network  | Usually Coax and Twinax  | 
  | 
  | networks. Today it is also  | 
  | 
  | used for larger Token  | 
  | 
  | Ring and Ethernet  | 
  | 
  | networks and/or Router  | 
  | 
  | base networks.  | 
  | 
  | 
  | 
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