Edited sentence: Bruce Sterling traces part of the roots of the computer underground to the Yippies, a 1960s counterculture movement which published the Technological Assistance Program (TAP) newsletter.Hacking developed alongside "Phone Phreaking", a term referred to exploration of the phone network without authorization, and there has often been overlap between both technology and participants.Other sources of early 70s hacker culture can be traced towards more beneficial forms of hacking, including MIT labs or the homebrew club, which later resulted in such things as early personal computers or the open source movement