I still have some floppy laying around with early version of the software which included a complete documentation of the format. ZIP has not been reverse engineered, for the simple reason that from day 1 it ZIP has been an open format. In August 2015, Microsoft announced that Office 2003 will not supported on Windows 8.1 and Windows 10.2) ZIP (tm) is widely used by countless libs and apps, and decompression has been reverse engineered, open sourced, dissected, inspected, and neglected (Apologies to Arlo Guthry) to death. Mainstream support of Office 2003 was ended on Apand extended support ended on April 8, 2014, the same day as mainstream support and extended support of Windows XP. In April 2009, Microsoft will be ended support of Office 2003 because was no longer supported after release in 2003. Microsoft Office 2003 Service Pack 3 was release on September 17, 2007.

Microsoft Office 2003 Service Pack 2 was release on September 27, 2005. Microsoft Office 2003 Service Pack 1 was release on July 27, 2004, this Service Pack has updates to fix bug issue of Microsoft Office 2003, the new features is Cached Exchange on Microsoft Word 2003. Office 2003 is incompatible with Windows NT 4.0, Windows 98, Windows ME and was compatible with Windows 2000 SP3, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7 and Windows Server 2008 R2 and no longer supported with Windows 8 and Windows Server 2012. Mainstream support of Office 2003 ended on April 14, 2009, extended support ended on April 8, 2014, the same day as mainstream support and extended support of Windows XP. Office 2003 was released to manufacturing on Augand was later to retail on October 21, 2003, exactly two years later after the release of Windows XP, it was successor to Office XP and predecessor to Office 2007. Microsoft Office 2003 (codenamed Office 11) is an office suite made by Microsoft for its Windows operating system.

Microsoft office 2003 service pack 3