Findings:

• channel surfing
• Channel
• The Sci-Fi Channel
• Channel One
• Fibre Channel
• Fox News Channel
• channel op
• The Weather Channel
• Fox Family Channel
• The Disney Channel
• premium channel
• Channel 4
• Channel 5
• video music channels
• TV Guide Channel
• The Comedy Channel
• Channel Islands
• independent film channel
• The Discovery Channel
• Mozambique Channel
• channel hopping
• alpha channel
• mask channel
• Discovery Channel Eco-Challenge
• Sega Channel
• fibre channel fabric
• Subliminal Channel
• Channel V
• Jukebox Channel
• The Learning Channel
• Channel Firing
• Words are a narrow channel
• Auau Channel
• Gold Channel
• The Fantasy Channel
• Discovery Channel Commercial: Meteor
• IRC channels that have absolutely nothing to do with their names
• Micro Channel
• Spice Channel
• drain channel
• Imagine if you achieved a higher state of being from the Weather Channel
• Snowy reception on some channels but not on others
• ion channel
• basic channel
• Channeled Scablands
• the Hitler Channel
• Channel 41
• The Discovery Channel Catalog
• delta channel
• River channel patterns
• Correlation channel
• History Channel
• Channel Zero
• Shannon channel capacity
• Irish Channel
• Channel 9
• calcium channel blocker
• Space Channel 5
• The Downer Channel
• channel grease
• Clear Channel's list of questionable songs
• Channel X
• UK terrestrial television channels
• Clear Channel Communications
• Dominguez Channel
• Channel Tunnel
• Donchian channels
• Fibre Channel Arbitrated Loop
• Channel 4's 100 Greatest Films
• Channel 4's Alternative Christmas Message
• SOFAR channel
• All News Channel
• digital specialty channels
• binary symmetric channel
• The sky above the port was the color of television, tuned to a dead channel
• sales channel
• channel conflict
• noisy channel
• Clear Channel
• Channel Islands National Park
• Make Me a Channel of Your Peace
• English Channel
• Bristol Channel Pilot Cutters
• channel temperature
• Bristol Channel
• South Channel Pile Light
• covert channel
• channel protein
• Deep sound channel
• You are live on Channel 4, please do not swear
• chopped and channeled
• Single Channel Ground and Airborne Radio System
• Fading channels
• Red Channels
• Kattegat Channel Conflict
• channel catfish
• Futaba Channel
• Channel 101
• potassium channel activator
• My hips channel George Washington
• Gospel Music Channel
• The Channel Chuckles
• The Shite Channel
• Laser induced plasma channel
• The Syfy Channel
• channel (user)
• No, I don't have channel 11
• Smithsonian Channel
• The channels switch, but it's all television.
• #ChangeTheChannel - The Channel Awesome Implosion
• Hallmark Channel
• La 1
• mainframe
• Zion mainframe
• hadie @ mainframe (user)
• Unisys A-Series mainframes
• Mainframe Entertainment

If you Log in you could create a "mainframe channel" node. If you don't already have an account, you can register here.