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.
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