GE GEFanuc Automation Programmable Control Products TCP/IP Ethernet Communications for the Series 90t-70 PLC GFK-1004B - Manual (Page 215)

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TCP/IP Ethernet Communications User’s Manual – January 1996 A-8 GFK-1004B
Transmission Control Protocol (TCP) The Internet standard connection-oriented
transport level protocol. See also Internet Protocol (IP).
Universal Address Administration See Global Address Administration.
Word A measurement of memory length, usually 4, 8, 16, or 32 bits long. In the Series
90 PLC, a word is always 16 bits.