Bill Atkinson, Macintosh GUI Pioneer, Passes Away

Bill Atkinson, the engineer behind much of the original Macintosh's groundbreaking graphical user interface (GUI), passed away on June 5th from complications of pancreatic cancer. Atkinson, Apple employee #51, was instrumental in the development of the first Macintosh and the Lisa's GUI. His innovations included the menu bar, the lasso selection tool, the "marching ants" animation, and an efficient circle-drawing algorithm. He's perhaps best known for HyperCard, a revolutionary hypermedia application creation system he described as a "software erector set." After leaving Apple, Atkinson pursued a passion for nature photography and joined the AI company Numenta in 2007. His passing marks the loss of a true tech legend whose impact on computing remains profound.