Adverts featuring the IMSAI 8080

The IMSAI 8080 - as featured in the 1983 film WarGames - was effectively a clone of the MITS Altair 8800, and even used the same expansion bus format. In doing so it legitimised the Altair bus, which as the renamed Standard-100 or S-100 bus became the de-facto expansion format for the rest of the 1970s and beyond.