Windows 1.0 BYTE demo

Windows 1.0 "Byte" Build is the earliest build of Microsoft Windows confirmed to exist. It was shown in 1983-12 issue of BYTE Magazine, though the build itself is much older and was already obsolette by the time the article was published. It had an interface similar to Word and Multiplan for DOS, with a command bar at the bottom of the screen, and featured overlapping windows (a feature that was later removed in favour of tiling windows). It was demonstrated to certain members of the press someday after 1983-05. It remains unleaked as of 2017.

Screenshots
 WinB83_1.png|Desktop and Context Menu WinB83_2.png|Basic86 for Windows Win1983p4.jpg|Microsoft Piano, bundled with Microsot Mouse software for DOS, is used as an example of an uncooperative app Win1983p5.jpg|Microsft Word Win1983p6.jpg|Word and Multiplan side-by-side Win1983p10.jpg|Graph maximized Win1983p11.jpg|Graph dialog box Win1983pcs.jpg|Windows could already run on all these machines, including an Apple II with a PC emulator card. 