Question: Which Walt Disney film was released first, Greyfriars Bobby or Tron?

Context articles: Discs of Tron
The Adventures of Greyfriars Bobby
Pinocchio (soundtrack)
Peter Pan (1953 film)
Tron: Legacy Reconfigured
Tron (franchise)
Adventures of Tron
Greyfriars Bobby (film)
Walt Disney Pictures
Christopher Figg

Discs of Tron, is the second arcade game based on the Disney film "Tron" (1982).
 While the first "Tron" arcade game had several mini-games (Gridbugs, Light Cycles, entering the MCP cone and Digital tanks), "Discs of Tron" is inspired by the jai alai–style sequence in the film in which Kevin Flynn is forced to play against Crom, leading to Crom being "derezzed" by Sark.
 Tron is also introduced later, as Flynn witnesses him competing against (and defeating) four of the MCP's "warrior elite".
The Adventures of Greyfriars Bobby is a family-based Scottish film released in the US in 2005 (as Greyfriars Bobby) and the UK in 2006, and directed by John Henderson.
 It is set in Edinburgh, Scotland, and tells the story of a Skye terrier called Bobby, who will not leave his master's grave after his death.
 The dog faces many perils because of this, and has to endure much in his struggle to be allowed to live his life.
Pinocchio is the soundtrack to the 1940 Walt Disney film of the same name, first released on February 9, 1940.
 The album was described as being "recorded from the original soundtrack of the Walt Disney Production "Pinocchio"".
 According to Walt Disney Records, "this is the first time the phrase 'original soundtrack' was used to refer to a commercially available movie recording".
Peter Pan is a 1953 American animated adventure film produced by Walt Disney and based on the play "Peter Pan, or The Boy Who Wouldn't Grow Up" by J. M. Barrie.
 It is the 14th Disney animated feature film and was originally released on February 5, 1953, by RKO Radio Pictures.
 "Peter Pan" is the final Disney animated feature released through RKO before Walt Disney's founding of his own distribution company, Buena Vista Distribution, later in 1953 after the film was released.
 "Peter Pan" is also the final Disney film in which all nine members of Disney's Nine Old Men worked together as directing animators.
 It is also the second Disney animated film starring Kathryn Beaumont, Heather Angel, and Bill Thompson after their roles in the animated feature "Alice in Wonderland".
Tron: Legacy Reconfigured (stylized on album artwork as Tron: Legacy R3C0NF1GUR3D) is a remix album of music by Daft Punk, released by Walt Disney Records on April 5, 2011.
 The album features remixes of selections of the by various contemporary electronic musicians.
 "Tron: Legacy Reconfigured" charted in several countries and peaked at number one in the "Billboard" Dance/Electronic chart.
 The album was released to mixed reviews.
Tron is an American science fiction media franchise.
 It began in 1982 with the Walt Disney Pictures film "Tron".
 It was followed by various film tie-ins, a comic series and the 2010 sequel "".
 More sequels were planned but have now been suspended, and a premiered on Disney XD in June 2012.
Adventures of Tron, or Tron for short, is an action game produced by Mattel in 1982 and the Mattel Intellivision/Atari 2600 version of the coin-operated arcade video game by the same name.
 It is based on the Disney film "Tron" and received fairly positive reviews from critics.
Greyfriars Bobby is a 1961 Walt Disney Productions feature film starring Donald Crisp and Laurence Naismith in a story about two Scottish men who compete for the affection of a Skye Terrier named Bobby.
 The screenplay by Robert Westerby was based upon the 1912 novel "Greyfriars Bobby" by Eleanor Atkinson which was based, in turn, upon an incident in 19th century Edinburgh involving a dog that came to be known as Greyfriars Bobby.
 It was the second film based upon Atkinson's novel, the first being "Challenge to Lassie" in which Crisp also starred.
 The film was directed by Don Chaffey and shot in England and Scotland.
 The film has been released to DVD.
Walt Disney Pictures, Inc. is an American film production company and a subsidiary of Walt Disney Studios, owned by The Walt Disney Company.
 The division is based at the Walt Disney Studios in Burbank, California, and is the main producer of live-action feature films within the Walt Disney Studios unit.
 It took on its current name in 1983.
 Today, in conjunction with the other units of Walt Disney Studios, Walt Disney Pictures is classified as one of Hollywood's "Big Six" film studios.
 Films produced by Walt Disney Animation Studios and Pixar Animation Studios are also released under this brand.
Christopher Figg (born 24 May 1957) is a film producer from the town of Aylesbury in Buckinghamshire, England.
 His film credits include "Heidi", "The Adventures of Greyfriars Bobby", "Dog Soldiers", "Trainspotting" and the first three films from the "Hellraiser" series: "Hellraiser", "", and "".
 He was recently executive producer on Noel Clarke's 4.3.2.1 and on the film "Coriolanus" (film) with Ralph Fiennes and Gerard Butler.