zip file format:
File: APPNOTE.TXT - .ZIP File Format Specification Version: 6.2.0 - NOTIFICATION OF CHANGE Revised: 04/26/2004 Copyright (c) 1989 - 2004 PKWARE Inc., All Rights Reserved. I. Purpose ---------- This specification is intended to define a cross-platform, interoperable file format. Since its first publication in 1989, PKWARE has remained committed to ensuring the interoperability of the .ZIP file format through this specification. We trust that all .ZIP compatible vendors and application developers that have adopted this format will share and support this commitment.