It was designed for CP/M , an operating system that preceded MS-DOS and was widely used on microcomputers in the late 70s and early 80s.
Records from historical software archives, such as PCNEWS 35 , list various iterations of YN.ZIP with timestamps ranging from January 1988 to April 1991 . Modern Context & Search Ambiguity yn.zip
In the era of bulletin board systems (BBS) and early computing, "YN" stood for , a recursive naming convention popular among programmers (similar to YACC—Yet Another Compiler-Compiler). It was designed for CP/M , an operating