Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 23 — Logic gates, ferrite core memory and the valve computer  /  About year 88
23.20

Printed circuit board and plug-in unit

the wiring etched in copper on a board, and each circuit a unit that can be pulled out and changed

MakingYear 88Stands on 293 earlier

AWhat it needs

Needs 293 other products in all, 4 of them directly.

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Open a box to see what it needs. A dashed box is a product already drawn in full: click it to jump there. In the org chart, drag to move around.

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