- https://www.youtube.com/watch?v=k_5M-z_RUKA
- https://en.wikipedia.org/wiki/Xbox_Live
- https://en.wikipedia.org/wiki/Nintendo_Wi-Fi_Connection
- https://en.wikipedia.org/wiki/PlayStation_Network
- https://en.wikipedia.org/wiki/Christmas_and_holiday_season#North_America
- https://segaretro.org/Sega_Channel#Pre-release_and_testing
- https://segaretro.org/Press_release:_1994-11-30:_Sega_Channel_test_a_success_--_service_prepares_for_national_rollout_in_December
- https://segaretro.org/Sega_Channel#History
- https://en.wikipedia.org/wiki/History_of_chess
- https://en.wikipedia.org/wiki/Game_Center
- https://en.wikipedia.org/wiki/Google_Play_Games
- https://en.wikipedia.org/wiki/OpenFeint
- https://en.wikipedia.org/wiki/Xbox_Live_Arcade
- https://en.wikipedia.org/wiki/PlayStation_Store
- https://en.wikipedia.org/wiki/Wii_Shop_Channel
- https://www.videogamemuseum.com/2009/10/27/rare-video-game-hunting-sega-channel-solar-panel-for-game-boy-etc/
- https://en.wikipedia.org/wiki/Sega_Channel#/media/File:Sega_Channel.svg
- https://chromagi.com/wp-content/uploads/snes-xband.cartridge.jpg
- https://segaretro.org/File:Xband.jpg
- https://gamefaqs.gamespot.com/snes/588872-x-band/images/23
- https://www.youtube.com/watch?v=kUlSqFlm4Kk
- https://jrra.zone/n64/
- http://snesmemories.blogspot.com/2011/01/xband-video-game-modem.html
- https://tedium.co/2017/07/19/sega-channel-history/
- https://findyourinnergeek.ca/2017/05/looking-back-sega-channel/
- https://en.wikipedia.org/wiki/SharkWire_Online
- http://emuconsoleexploitnews.blogspot.com/2011/04/before-64dd-there-was-morita-shogi-64.html
- https://en.wikipedia.org/wiki/History_of_shogi
- https://64dd.fandom.com/wiki/Randnet
- https://micro.blog/shinypb
