The Apple Lisa was a groundbreaking machine when it launched over three decades ago in 1983. It was one of the very first commercially available computers that had a graphical user interface or GUI. More than having a slick GUI interface, the Lisa computer is known for being a massive flop.

Apple invested $150 million in R&D on the machine,

Source: Hot Hardware – Computer History Museum To Release Apple Lisa OS Source Code For Free Use In 2018