Personal Computing
Power to the people — by way of the silicon shop.
Kernel
The personal-computer thesis is the first Silicon Valley ideology that successfully fuses counterculture with capitalism. The dream — every individual gets a tool for thought equal to a mainframe — comes from Engelbart, Kay, and the Whole Earth orbit; the execution comes from Jobs, Wozniak, and Bill Gates. The result is a generation that learns to associate liberation with consumer hardware, and a business model that turns that association into a trillion-dollar annuity.
Origins
Doug Engelbart's 1968 "Mother of All Demos" shows the entire future in 90 minutes: mouse, hypertext, video conferencing, real-time collaboration. Alan Kay imagines the Dynabook. Xerox PARC builds it (Alto, 1973) but cannot ship it. Jobs visits, sees, and reshapes the consumer market around the metaphor.
Doctrine
Computers are bicycles for the mind. Tools should be in the hands of users, not priests. Aesthetic matters because it carries dignity to the desk. The single best thing you can do for humanity is to put a computer in front of one more person.
Lineage
Apple → Macintosh → NeXT → return → iPhone → AirPods → Vision Pro. Microsoft → Windows → Office → Azure → Copilot. Each successive product re-rolls the same wager: that the locus of human attention can be moved one notch closer to the silicon and one notch farther from the page.
Conflicts
Open versus closed: the IBM-PC clone wars taught Silicon Valley that openness wins distribution but loses margin. The 2010s mobile era inverted the lesson — closed wins margin and distribution. The unfinished question of personal computing is whether the AI era reverts to closed (ChatGPT, the new mainframe) or breaks open again (Llama, local-first).
Trajectory
The personal-computer movement quietly ended in 2007 when the iPhone made the user a tenant on someone else's machine. The AI agent era is its successor, and the same question recurs: tool, or platform?