changeover channel channel hopping channel op channel service unit channel service unit/data service unit chaos CHAP char character character encoding character encoding scheme character graphics character key character repertoire
| character set character set identifier characteristic function Charge-Coupled Device CHARITY charityware Charles Babbage Charles Simonyi CHARM CHARM++ Charme CHARYBDIS chase pointers CHASM chat
| chat room chatbot chatterbot cheapernet checkdigit Checkout Test language checkpoint checksum chemist Chen CHEOPS Chernobyl packet chess CHI Chicago
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