We are Legion.

Anonymous is a hacking group that initiates acts of civil disobedience without revealing user identities. Anonymous originated in 2003 in the "4chan" imageboard to symbolize the concept of an online global brain of community users. Anonymous is known for its widespread and rebellious hacking activities.

Although Anonymous is not specifically linked to a single online entity, the group is firmly interconnected via several websites comprised of noteworthy imageboards like Futaba, 4chan, affiliated wikis, Encyclopedia Dramatica and a variety of forums.

Main Headquarters[anonhq.com]