The document summarizes Lev Manovich's book "Software Takes Command" and Alan Kay's vision for personal computing. It discusses how Kay envisioned the Dynabook as a personal, dynamic media device that could simulate and integrate different artistic media through a remediation process. The presentation traces the origins of personal computing from Kay's work at Xerox PARC in the 1970s-1980s to the modern concept of media computing and digital culture.