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Tech HistoryDeep Dive October 3, 2026 10 min read

Apple II: How Video, Memory, and Expansion Made a Platform

A technical history of the Apple II's 6502, color video, memory map, expansion slots, cassette-to-disk transition, and software ecosystem.

#apple-ii#6502#personal-computing

Tech HistoryDeep Dive October 3, 2026 9 min read

VisiCalc: The Interactive Spreadsheet That Made PCs a Business Tool

Explore VisiCalc's grid, cell formulas, interactive recalculation, Apple II constraints, and the software-publishing choices that helped PCs find business users.

#visicalc#spreadsheet-history#apple-ii