A Personal Computer for Children of All Ages Alive
The Dynabook memo — a notebook computer for every child, imagined years before the Alto that partially built it. Smalltalk was designed to be its software.
Kay's 1972 Xerox PARC memo described the Dynabook: a notebook-sized personal computer, usable by children, holding all its owner's media — written when computers filled rooms and cost more than houses. Kay designed a cardboard model in 1969; the memo made it PARC's informal charter.
The interim Dynabook became the Alto; its software became Smalltalk, whose overlapping windows and icons defined the GUI. The memo's test — 'does it empower its user?' — remains the standard the industry periodically rediscovers.