The Microvision came out in 1979 and was the first handheld with interchangeable cartridges.

Logo by Ross Allman, animated intro by Danny Carter, and channel banner by Dave (YouTuber SMAAAASHTV).

My other channels:

Gamester81in3D-videogame reviews in 3D:
http://www.youtube.com/user/Gamester81in3D

Gamester81Arcade-Arcade game reviews:
http://www.youtube.com/user/Gamester81Arcade

NEStalgiaholic-70's, 80's, 90's and today memorabilia and more: http://www.youtube.com/user/NEStalgiaholic

Starwarsnut77-Star Wars & Sci Fi stuff:
http://www.youtube.com/user/starwarsnut77

Allgengamers YouTube Channel:
http://www.youtube.com/user/allgengamers

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Listen to my podcast Allgengamers with cohost HappyConsoleGamer, PeteDorr, and TheEMUreview:
http://allgengamers.com