100 Users

One of the most interesting ideas at Parc was: “every invention has to be engineered for 100 users”. So if you do a programming language or a DTP word processor, etc, it has to be documented for and usable by 100 people. If you make a personal computer, you have to be able to make 100 of them. If an Ethernet, it has to connect to 100 devices, etc.

Alan Kay, What made Xerox PARC special?

PARC, MVP, Design Patterns