Know why cattywampus was trending last week?
1845, "animal which browses," agent noun from browse (v.). In the computer sense by 1982.
The first browser was invented at PARC by Larry Tesler, now a designer at Apple Computer. Tesler's first Smalltalk browser was a tree-structured device. It enabled programmers to hunt quickly for items in a Smalltalk dictionary. ["InfoWorld" magazine, vol. v., no. 4, Jan. 24, 1983]
A software program that facilitates entry to and usage of the Internet.
See Web browser.