Windows 1.0Microsoft introduces a graphical user interface for the IBM PC compatible computers, Windows 1.0. Essentially a GUI shell for Microsoft’s MS-DOS operating system, Windows arrives over two years after it was initially announced in 1983. To avoid legal entanglements with Apple (which has already launched a more visually-pleasing user interface with its Macintosh computers), Microsoft deliberately omits such now common features as overlapping or resizeable windows. Due to the amount of RAM in most users’ PCs, Windows’ multitasking ability is extremely limited.