logger (n.1)

"to fell trees for logs," 1717; earlier "to strip a tree" to make it a log (1690s), from log (n.1). Related: Logged; logging (n.1).

"to enter into a log-book," 1823, from log (n.2). Meaning "to attain (a speed) as noted in a log" is recorded by 1883. Meaning "to log in to a computer" is from 1963; it also sometimes is used to mean "log off" of a computer or program. Related: Logged; logging (n.2).