<Tr> <Th> Predecessor </Th> <Td> Apple II Plus Apple III </Td> </Tr> <Tr> <Th> Successor </Th> <Td> Macintosh XL Macintosh </Td> </Tr> <P> The Apple Lisa is a desktop computer developed by Apple, released on January 19, 1983 . It was one of the first personal computers to offer a graphical user interface (GUI) in a machine aimed at individual business users . Development of the Lisa began in 1978, and it underwent many changes during the development period before shipping at the very high price of US $9,995 with a 5 MB hard drive . The high price, relatively low performance and unreliable Apple FileWare, or "Twiggy" floppy disks, led to poor sales, with only 100,000 units sold . However, these sales generated about $1 bn in revenue, which would later help keep the company afloat amidst an ongoing crisis . </P> <P> In 1982, after Steve Jobs was forced out of the Lisa project, he joined the Macintosh project, at that time developing a much more limited machine with a task - switching interface . Jobs redirected the Macintosh team to build a cheaper and better Lisa, releasing it in January 1984 and quickly outstripping Lisa sales . Newer versions of the Lisa were introduced that addressed its faults and lowered its price considerably, but it failed to achieve favorable sales compared to the much less expensive Mac . The final revision of the Lisa, the Lisa 2 / 10, was modified and sold as the Macintosh XL . </P>

When did apple begin to sell the lisa computer