Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 21 — Microphone, speaker, magnetic tape and the telephone exchange  /  About year 60
21.07

Telephone numbers, the directory and the emergency number

every telephone has a number, a printed book lists them, and one short number brings help

SocietyYear 60Stands on 276 earlier

AWhat it needs

Needs 276 other products in all, 2 of them directly.

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