from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To gain access to a computer system, usually by providing a previously agreed upon username and password.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To establish communication with a host computer from a terminal or remote computer.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. enter a computer
From analogy with clock in. (Wiktionary)