Windows Odyssey
From BetaArchive Wiki
Windows Odyssey was aimed towards a new business version of Windows NT, which would have been NT 6.0 (until Microsoft messed around with names) but soon became canceled and merged with Neptune to create WHISTLER which is now our Windows XP which includes Professional (business) and Home! One version of Neptune was released to the public (5111) but no version of Odyssey was released as of now.