Complete Protocol dictionary, glossary and reference

Zmodern

ZMODEM is a file transfer protocol developed by Chuck Forsberg in 1986, to improve file transfers over X.25 network. In addition to dramatically improved performance compared to older protocols XMODEM and YMODEM, ZMODEM also offered restartable transfers, auto-start by the sender, an expanded 32-bit CRC, and control character quoting, allowing it to be used on networks that might "eat" control characters. ZMODEM became extremely popular on bulletin board systems in the early 1990s, displacing earlier protocols such as XMODEM, YMODEM and JMODEM.

Standard Organization

Apple

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