Nintendo, Sega, and Atari are all companies that have been producing video games for decades. Nintendo is an 8-letter company that has been around since the late 1970s and is known for its iconic characters such as Mario and Donkey Kong. Sega is a 4-letter company that was founded in the 1960s and is known for its Sonic the Hedgehog series. Atari is a 5-letter company that was founded in 1972 and is known for its classic arcade games such as Pong and Asteroids. All three companies have had a major impact on the video game industry and continue to produce popular titles today.