Modems: 60 years of hooking up

A visual guide to the history of the modem, from the 1950s to today.

Page 5 of 13

The First PC Modem 

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After the Carterfone decision, non-Bell companies began selling computer modems. One of the most notable for our purposes was the Hayes 80-103A, a 300-baud Bell 103A-compatible modem that happened to be the first modem created for a personal computer. Dale Heatherington (shown here) and Dennis C. Hayes designed it for S-100 bus computers of the day, such as the Altair 8800 and the IMSAI 8080.

Photos: Dale Heatherington

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