Stone to Silicon

Communication · 1958

Modem

Computers start talking to each other over ordinary telephone lines.

AT&T's Bell 101 modem, derived from the SAGE air defense network, went on sale in 1958 at 110 bits per second. Modems let computers share data remotely, and dial-up speeds reached 56 kbit/s by the late 1990s, carrying most early home internet.

See it in the living treeWikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 3

What it led to 1

Related measurements

The dashed line marks when it first worked.

Fixed broadband subscriptions per 100 people Latest: 20.1 per 100 people (2025) Source: Our World in Data

Internet users in the United States Latest: 322M people (2024) Source: Our World in Data