AVA.ZIP B 22813 891125 QuickBBS automated verification algorithm BSRC_250.ZIP B 463372 911004 Binkleyterm mail/term pgm v2.50 source CKIT210.ZIP B 199914 920210 Turbo-C/MSC BBS DOOR programming kit HSRC_117.ZIP B 135418 910510 HeadEdit v1.17 Sysop/Point reader source code