Apple Lisa#Software

Lisa OS (Lisa Office System) was one of the first operating systems with a fully graphical user interface.

It was used in 1983 exclusively on the Apple Lisa Apple. It brought simple multitasking and virtual memory to use, then extremely advanced features for a personal computer. However, the use of virtual memory, together with the relatively slow floppy disk system made ​​the system performance seem sometimes very slow. Conceptually, LISA OS was inspired by the Xerox Star system. Lisa had two Benutzungsmodi: the graphical Office system and the text-based workshop.

The workshop was an almost entirely text- based programming environment, but an editor with a graphical user interface began.

The Office System came with a spreadsheet program ( LisaCalc and LisaList ), a program for creating graphics (Lisa graph ), a project management tool with built-in Program Evaluation and Review Technique / Gantt chart (Lisa Project), a drawing program ( LisaDraw ) and optionally a DEC VT / ANSI terminal emulator (Lisa terminal).