What does CH stand for?

What does CH mean?

CH	CA Clipper Header file Computing » File Extensions
CH	Cab Heater Governmental » Transportation
CH	Cabbage Head Miscellaneous » Food
CH	Cantons de Helvetia (Switzerland) Regional
CH	Captain Hypnosis Miscellaneous » Funnies
CH	Cargo Helicopter Governmental » Military
CH	Case Harden Governmental » Military
CH	Central Heating Business » Products
CH	Centre Hice Miscellaneous » Unclassified
CH	Certified Herbalist Medical » British Medicine
CH	Certified Hypnotherapist Business » Positions
CH	Chamberlain Hall Academic & Science » Universities
CH	Champion Community » Sports
CH	Champion Miscellaneous » Dogs Related
CH	Channel Governmental » Military
CH	Channel Computing » Networking
CH	Channel Governmental » Suppliers
CH	CHannel Governmental » NASA
CH	Channelized Governmental » FBI Files
CH	Chaplain Governmental » Military
CH	Characteristic Medical » Physiology
CH	Check! Miscellaneous » Chess
CH	Chest Medical » Physiology
CH	Chicago Operations Office Governmental » US Government
CH	Chicky Hearn Miscellaneous » Unclassified