Meatballs is a 1979 Canadian comedy film directed by Ivan Reitman.
 It is noted for Bill Murray's first film appearance in a starring role and for launching the directing career of Reitman whose later comedies included "Stripes" (1981) and "Ghostbusters" (1984), both starring Murray.
 The film also introduced child actor Chris Makepeace in the role of Rudy Gerner.
 It was followed by several sequels, of which only "" (1986) had any connection to the original.
Caddyshack II is a 1988 American sports comedy film and a sequel to "Caddyshack".
 The film stars Jackie Mason, Dan Aykroyd, Robert Stack, Dyan Cannon, Randy Quaid, Chevy Chase, Jonathan Silverman, and Jessica Lundy.
 It was written by various outside writers, but is credited to the first draft by Peter Torokvei and Harold Ramis, who also co-wrote and directed the first, and is directed by Allan Arkush.
Ghostbusters (also known as Ghostbusters: Answer the Call and marketed as such on home release) is a 2016 supernatural comedy film directed by Paul Feig and written by Feig and Katie Dippold.
 The film stars Melissa McCarthy, Kristen Wiig, Kate McKinnon, Leslie Jones, Neil Casey, Andy García, Cecily Strong, and Chris Hemsworth.
 It is the third feature film in the "Ghostbusters" franchise, and serves as a reboot of the series.
 The story focuses on four women who begin a ghost-catching business in New York City.
 It also marks the fourth collaboration between Feig and McCarthy.
Stripes is a 1981 American buddy military comedy film directed by Ivan Reitman, starring Bill Murray, Harold Ramis, Warren Oates, P. J. Soles, Sean Young, and John Candy.
 Several actors including John Larroquette, John Diehl, Conrad Dunn and Judge Reinhold were featured in their first significant film roles.
 Joe Flaherty, Dave Thomas, Timothy Busfield and Bill Paxton also appeared early in their careers.
"Ghostbusters" is a song written and recorded by Ray Parker Jr. as the theme to the film of the same name starring Bill Murray, Dan Aykroyd, Harold Ramis, and Ernie Hudson.
 Debuting at #68 on June 16, 1984, the song reached number one on the "Billboard" Hot 100 on August 11, 1984, staying there for three weeks, and at number two on the UK Singles Chart on September 16, 1984, staying there for three weeks.
 The song re-entered the UK Top 75 on November 2, 2008, at No. 49.
Ghostbusters II is a 1989 American supernatural comedy film directed and produced by Ivan Reitman, written by Dan Aykroyd and Harold Ramis and starring Bill Murray, Aykroyd, Sigourney Weaver, Ramis, Ernie Hudson and Rick Moranis.
 It is the sequel to the 1984 film "Ghostbusters", and follows the further adventures of the three parapsychologists and their organization which combats paranormal activities.
The proton pack is an energy weapon used for weakening ghosts and aiding in capturing them within the "Ghostbusters" universe.
 First depicted in the film "Ghostbusters", it has a hand-held wand ("Neutrona Wand" or particle thrower) connected to a backpack-sized particle accelerator.
 It fires a stream of highly focused and radially polarized protons that electrostatically traps the negatively charged energy of a ghost, allowing it to be held in the stream.
Foxy Lady is a 1971 film directed by Ivan Reitman.
 It was Ivan Reitman's debut feature film and was also the first film appearance of Eugene Levy.
Ghostbusters is a 1984 American supernatural comedy film directed and produced by Ivan Reitman and written by Dan Aykroyd and Harold Ramis.
 The film stars Bill Murray, Aykroyd and Ramis as eccentric parapsychologists who start a ghost-catching business in New York City.
 Sigourney Weaver and Rick Moranis co-star as a client and her neighbor, and Ernie Hudson as the Ghostbusters' first recruit.
Year One is a 2009 American comedy film directed by Harold Ramis, and produced by Judd Apatow.
 The film stars Jack Black and Michael Cera.
 The film was released in North America on June 19, 2009 by Columbia Pictures, where it received negative reviews from critics and underperformed at the box office.
 The film would be Ramis' last as an actor, writer, and director before his death in 2014.

Question: The proton pack was first depicted in the film "Ghostbusters", an American supernatural comedy film directed and produced by Ivan Reitman and written by Dan Aykroyd and Harold Ramis and released in what year?
Answer: 1984