computer user a person who uses computers for work or entertainment or communication or business
computer science,
computing the branch of engineering science that studies (with the aid of computers) computable processes and structures
cracker a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends
hacker a programmer for whom computing is its own reward; may enjoy the challenge of breaking into other computers but does no harm; "true hackers subscribe to a code of ethics and look down upon crackers"
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Wiktionary
Substantiv
coder -
A device that generates a code, often as a series of pulses.
