CommaVid was a company who made Atari 2600 games back in the early 80's.
They originally used the name Computer Magic (some of their games are labeled that way). They are one of the more interesting software companies of the classic Atari era. All of their cartridges are hard to find, most notably MagiCard. Although CommaVid's games were not the most popular with the fans, they were some of the most innovative. The majority of their games were only available by mail order.
CommaVid Game Listing