Roger Keith “Syd” Barrett (6 January 1946 – 7 July 2006) was an English singer, songwriter, guitarist and artist. He is most remembered as a founding member of British progressive rock band Pink Floyd, providing major musical and stylistic direction in their early work, although he left the group in 1968 amidst speculations of mental illness exacerbated by heavy drug use.
He was active as a rock musician for about seven years, recording two albums with Pink Floyd and two solo albums before going into self-imposed seclusion lasting more than thirty years. His post–rock band life was as an artist and keen gardener, ending with his death in 2006, and a number of biographies have been written about him since the 1980s. During his withdrawal from public life there were numerous speculative, although largely appreciative works about him, most notably his former band Pink Floyd’s 1975 album Wish You Were Here. (c) wiki

Richard William “Rick” Wright (born July 28, 1943 in Hatch End, London) is a self-taught pianist and keyboardist best known for his long career with Pink Floyd. Though not as prolific a songwriter as his bandmates Syd Barrett, Roger Waters and David Gilmour, he did write significant parts of the music for classic albums like Meddle, Dark Side of the Moon and Wish You Were Here, as well as for Pink Floyd’s most recent studio album The Division Bell. Wright’s richly textured keyboard layers have been a vital ingredient and a distinctive characteristic of Pink Floyd’s sound. In addition, Wright frequently sang background and occasionally lead vocals onstage and in the studio with Pink Floyd (most notably on the songs “Time”, “Echoes”, and on the Syd Barrett composition “Astronomy Domine”). (c) wiki

Nicholas Berkeley “Nick” Mason (born January 27, 1944 in Edgbaston, Birmingham, England) is the drummer for Pink Floyd. He has been the only constant member of the band since its formation in 1964. He also competes in auto racing events, such as the 24 Hours of Le Mans. (c) wiki