The 50th Academy Awards ceremony, presented by the Academy of Motion Picture Arts and Sciences (AMPAS), honored films released in 1977 and took place on April 3, 1978, at the Dorothy Chandler Pavilion in Los Angeles beginning at 7:00 p.m. PST / 10:00 p.m. EST. During the ceremony, AMPAS presented Academy Awards (commonly referred to as Oscars) in 23 categories. The ceremony, televised in the United States by ABC, was produced by Howard W. Koch and was directed by Marty Pasetta. Actor and comedian Bob Hope hosted for the nineteenth time. He first presided over the 12th ceremony held in 1940 and had last served as a co-host of the 47th ceremony held in 1975. Five days earlier, in a ceremony held at The Beverly Hilton in Beverly Hills, California, on March 29, the Academy Scientific and Technical Awards were presented by hosts Kirk Douglas and Gregory Peck.