YMODEM |
:advent, ar, arc, at, cal, cat, chess (gnu), cmp, comm, compress, conquest, cron, dd, diff, ed, eroff, grep, head, indent, make, MicroEMACS, more, nroff, roff, sc, sed, sort, split, STEVIE, strings, sum, tail, tar, tee, ularn, uniq, vi, wanderer, wc, xmodem, ymodem, zmodem, zoo
The program featured all the standard functions of a BBS of the time including file transfers in several competing protocols (XMODEM, YMODEM, YMODEM-G, ZMODEM) provided with the program or as third party software; they connected externally to the main program itself.
Chuck Forsberg collected a number of these into his YMODEM protocol, but poor implementation led to a further fracturing before they were re-unified by his later ZMODEM protocol.
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It was made obsolete by variants such as YMODEM-g or ZMODEM.
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XMODEM-1K was originally one of the many improvements to XMODEM introduced by Chuck Forsberg in his YMODEM protocol.
However, despite this protocol potentially being faster than ZMODEM it was still rarely used.
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It was formally given the name "YMODEM" in 1985 by Ward Christensen.