Unquestionably one of the most popular rock groups in the world, Irish unit U2 began their musical career while they were students at Dublin's Mount Temple School. Originally called Feedback and then The Hype, the group finally decided on U2 in the year 1978. Bono (lead vocals), the Edge (guitars, piano, vocals), Larry Mullen Jr. (drums, vocals) and Adam Clayton (bass) played many small clubs and venues in their native country of Ireland. The following year the band released their first record, a three-track EP entitled U23. By 1980, U2 had built up quite a following and began to gain considerable success. The same year U2 signed to Island Records and released their first single, "11 O'Clock Tick Tock."