The Lisa was the first computer to feature a graphical user interface (GUI). Apple released it in 1983, but since then has been discontinued. However, for those interested in learning more about the technology behind this revolutionary device, its source code is now available for download. The code includes graphics and windowing system functions that were used on the original Lisa hardware platform. With this code as reference material, it can be interesting to explore how GUI systems have evolved over time.
For anyone looking to learn more about programming or software engineering history, being able to access and study the source code of such an iconic machine as the Lisa is invaluable. It provides insight into early computing technologies and their development process and allows us to appreciate what modern computers are capable of today compared with their predecessors from decades ago.
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