The original version of Microsoft Windows, which was announced in 1983 and introduced in 1985. Windows 1.0 was a DOS application that provided a rather awkward graphical interface and windowing environment. Its "MS-DOS Executive" was the launching pad for applications that were displayed in side-by-side windows that could not be overlapped with each other.Windows 1.0 included a clipboard, calendar, clock, control panel, Notepad editor, Windows Write and Windows Paint, but it was not very popular. It took five more years before Windows caught on (see Windows 3.0). See Windows and Windows 2.0.