2600: The Hacker Quarterly

2600: The Hacker Quarterly is an American seasonal publication of technical information and articles, many of which are written and submitted by the readership, on a variety of subjects including hacking, telephone switching systems, Internet protocols and services, as well as general news concerning the computer "underground."

With origins in the phone phreaking community and late 20th-century counterculture, 2600 and its associated conference transitioned to coverage of modern hacker culture, and the magazine has become a platform for speaking out against increased digital surveillance and advocacy of personal and digital freedoms.