Computer companies disestablished in 1975

Signetics Corporation was an American electronics manufacturer specifically established in Silicon Valley to make integrated circuits. Founded in 1961, they went on to develop a number of early microprocessors and support chips, as well as the widely used 555 timer chip. The company was bought by Philips in 1975 and incorporated in Philips Semiconductors (now NXP).

Traf-O-Data was a business partnership between Bill Gates, Paul Allen and Paul Gilbert that existed in the 1970s. The objective was to read the raw data from roadway traffic counters and create reports for traffic engineers. The company had only modest success but the experience was instrumental in the creation of Microsoft Corporation a few years later.