DEF CON (also written as DEFCON, Defcon, or DC) is one of the world's largest annual hacker conventions, held annually in Las Vegas, Nevada, with the first DEF CON taking place in June 1993. Many of the attendees at DEF CON include computer security professionals, journalists, lawyers, federal government employees, security researchers, students, and hackers with a general interest in software, computer architecture, phone phreaking, hardware modification, and anything else that can be "hacked." The event consists of several tracks of speakers about computer- and hacking-related subjects, as well as social events Wargames and contests in everything from creating the longest Wi-Fi connection and hacking computer systems to who can most effectively cool a beer in the Nevada heat.