Title: Lost Original Television Soundtracks
Content:  The orchestral score of Lost is composed, orchestrated, and produced by Michael Giacchino and has been released on a series of soundtrack albums by Varèse Sarabande.
Title: Lost (TV series)
Content:  Lost features an orchestral score performed by the Hollywood Studio Symphony Orchestra and composed by Michael Giacchino, incorporating many recurring themes for subjects, such as events, locations, and characters. Giacchino achieved some of the sounds for the score using unusual instruments, such as striking suspended pieces of the plane's fuselage. On March 21, 2006, the record label Varèse Sarabande released the original television soundtrack for Losts first season. The soundtrack included select full-length versions of the most popular themes of the season and the main title, which was composed by series creator J. J. Abrams. Varèse Sarabande released a soundtrack featuring music from season 2 of Lost on 
Title: Lost in Space
Content:  Much of the incidental music in the series was written by Williams who scored four episodes. These scores helped Williams gain credibility as a composer. Other notable film and television composers who worked on the music for Lost in Space included Alexander Courage, who contributed six scores to the series.
Title: Lost Themes
Content:  Lost Themes is the debut studio album by American film director and composer John Carpenter. It was released on February 3, 2015, through Sacred Bones Records. Carpenter created Lost Themes in collaboration with his son Cody Carpenter and his godson Daniel Davies. While Lost Themes is his first stand-alone album, Carpenter has composed numerous critically acclaimed soundtracks for films since the 1970s, including for the films Assault on Precinct 13, Halloween, and Escape from New York.
Title: The Lost Man
Content:  The film score was composed by Quincy Jones and conducted by Stanley Wilson, and the soundtrack album was released on the Uni label in 1969.
Title: Lost (Cold Chisel song)
Content:  "Lost" was written by regular Cold Chisel songwriter Don Walker and former Australian Idol contestant Wes Carr in 2012. The pair had a number of writing sessions together. Walker said, "After putting out an album of the normal stuff that Idol people have to record, he wanted to do an album of real songs and wanted to see if I could get involved in some co-writing." Carr, who had played the song live for two years before Cold Chisel recorded it, said, ""Lost" is very close to my heart. For me, at that time, I was pretty lost in life. I've always felt like i never really truly have found my place in life." Barnes said, "The song was classic Cold Chisel. Don's chord changes were as tricky to sing over as ever, but once I found the way they moved, the melodies were perfect. We hadn't been on the singles chart for a long time." The song did not initially make the short list for the album, before strings and backing vocals were suggested by producer Kevin Shirley. Subsequently, put out as the single, a video was also released.
Title: Lost (TV series)
Content:  Lost was produced by ABC Studios, Bad Robot Productions, and Grass Skirt Productions. Throughout its run, the executive producers of the series were Damon Lindelof, J. J. Abrams, Bryan Burk, Carlton Cuse, Jack Bender, Jeff Pinkner, Edward Kitsis, Adam Horowitz, Jean Higgins, and Elizabeth Sarnoff, with Lindelof and Cuse serving as showrunners.
Title: Lost (Frank Ocean song)
Content:  "Lost" is a song by American singer-songwriter Frank Ocean. It was released as the fourth single from his debut studio album Channel Orange (2012). The song was written by Ocean, Micah Otano, and Malay; with production handled by the latter. The single has also been covered by American record production trio Major Lazer, featuring vocals from Danish singer MØ, along with English electro band Swiss Lips as well as covered by English singer-songwriter Jorja Smith.
Title: Lost (Cher Lloyd song)
Content:  "Lost" is a song by English singer Cher Lloyd from her upcoming third studio album. It was released on 24 April 2020 under Universal Music Group as the second single from the album. An accompanying video directed by Raja Virdi was released on April 24. Writing for The Guardian, Leonie Cooper said: "There is something heartening about this largely harmless return."
Title: All Is Lost
Content:  The film score to All Is Lost is composed by Edward Sharpe and the Magnetic Zeros' frontman Alex Ebert, who signed on to the film in November 2012. Speaking of the experience of working on the film, Ebert said, "This project was a dream—an open space to play in but also space to listen to the elements—wind, water, rain, sun, are the story's other characters to me. I knew I had quite a task ahead of me: to at once allow the elements to sing and to give Redford a voice with which to, once in a while, respond." The "extra features" of the Blu-ray Disc explain the unique development of the sound track, music, script and other production considerations. A soundtrack album featuring ten original compositions and one new song, all written, composed, and produced by Ebert, was released on October 1, 2013 by Community Music. On September 12, 2013, the song "Amen" from the soundtrack was made available for streaming.

Question: Who was the composer of Lost?
Answer: Michael Giacchino.
Michael George Giacchino.