where it would be a local phone call for more users. Christensen patterned the system after the cork board his local computer club used to post information like "need a ride". CBBS officially went online on 16 February 1978. CBBS, which kept a count of callers, reportedly connected 253,301 callers before it was finally retired.

Smartmodem

A key innovation required for the popularization of the BBS was the Smartmodem manufactured by Hayes Microcomputer Products.

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