Re:The origin of “log in” (2011)
by esquivalience on Wednesday April 30, 2014 @06:50AM
(#7672527)
Surprised it hasn't come up in this thread already, but an excellent and free resource for this sort of thing is EtymOnline[0]. It's volunteer-made[1], has an easy search and quick on-results-page answers.
Here's the search page for Log: http://www.etymonline.com/index.php?term=log
[0] http://www.etymonline.com [1] at least mostly - see https://news.ycombinator.com/item?id=2580631