Finger is a networking tool and one of the earliest computer networking programs that enabled a user to view another user’s basic information when that user used that same computer system or was logged on in the same network. The program can determine user identity though an email address and determine whether that user is currently logged in, as well as the status of their log sessions.

It was originally created by Les Earnest in 1971 and later became a standard part of BSD UNIX, and was commonly used by Windows users. This was later interfaced by David Zimmerman with the Name program to become the Name/Finger Protocol in 1977.