PKWARE’s APPNOTE.TXT – .zip file format specification

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http://www.pkware.com/documents/casestudies/APPNOTE.TXT – THE document defining the pkzip file format
https://en.wikipedia.org/wiki/PKZIP
PKWARE is for “Phil Katz Software”
there was a famous lawsuit between SEA and PKWARE about the source code, that pkzip was based on, as it got actually derived from shareware written by SEA
at the time both SEA and PKWARE were small home-based companies

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