TECHNOLOGY
IBM System/360
The 1964 family of mainframe computers whose unified architecture across a wide range of hardware became the dominant platform of the mainframe era — and whose operating system, OS/360, taught Brooks the lessons that became The Mythical Man-Month.
IBM announced the System/360 on April 7, 1964, in what was then the largest product announcement in computing history. The central innovation was architectural: a single instruction-set architecture spanning models from small entry-level systems to large scientific computers, allowing customers to upgrade without rewriting their software. Brooks was the chief architect of the instruction set. The project risked the company — IBM committed roughly five billion dollars (more than its annual revenue) to the development — and succeeded beyond its planners' expectations, establishing IBM's dominance of mainframe computing for the following two decades and producing an architecture whose descendants (IBM z/Architecture) remain in production more than sixty years later. OS/360, the operating system developed for the family, was a different story: late, over budget, and the empirical source of nearly every principle in The Mythical Man-Month.
In The You On AI Field Guide
System/360's success established several patterns that the computer industry would replicate