# Rex

Rex or REX may refer to:

## Animals
### Dogs

* Rex (Ronald Reagan's dog)
* Rex (search and rescue dog), a dog that received a 1945 Dickin Medal for bravery

### Other animals

* -rex, a taxonomic suffix used to describe certain large animals
* Tyrannosaurus rex, a large predatory cretaceous dinosaur
* Rex (horse) or Rex the Wonder Horse, star of 15 Hollywood motion pictures
* Rex rabbit, a breed of rabbit
** Rex mutation, a type of mutation affecting the fur of the rex rabbit
** One of at least three types of rabbit fur collectively known as "rex fur"

## Computing and technology

* REX prefix, used by the x86-64 instruction encoding
* Rexx (originally named Rex), a computer programming language
* REX, an audio file format; see REX2
* .rex (disambiguation), file extension used by Rexx scripts and REX2 audio files
* REX 5000, a series of personal digital assistants
* REX 6000, a series of personal digital assistants
* Rex (software), a remote execution, configuration management and software deployment system
* Rex (video game), a 1988 game for the ZX Spectrum and Amstrad CPC
* REX OS, a real-time operating system developed by Qualcomm
* Samsung REX, a series of affordable feature phones
* REX, an abbreviation for "request to exit", a push-button or motion detector used for access control

## Energy and fuels

* Rockies Express Pipeline, a natural gas pipeline built across the United States
* Rex Energy, a defunct company engaged in natural gas exploration
* Rex International Holding Limited, an oil and gas company headquartered in Singapore

## Fictional characters
### Film

* Rex Lewis, a character from G.I. Joe: The Rise of Cobra
* Rex Manning, the former 80s pop idol in the 1995 film Empire Records
* Rex (Toy Story), a toy dinosaur character from Disney/Pixar's Toy Story series
* Rex, the sheepdog from the 1995 Academy Award-winning film Babe
* Rex, a Tyrannosaurus Rex, a character in animated film We're Back! A Dinosaur's Story
* Rex Kwon Do, a martial arts choreographer in the 2004 cult film Napoleon Dynamite
* Rex, Lori's boss in the film Ted
* Rex Motion Picture Company, was an early film production company in the United States from 1910 into 1917
* Rex (film), alternative name for Megan Leavey, 2017

### Animated television series

* Rex Banner, a one-time character in The Simpsons appearing in the episode "Homer vs. the Eighteenth Amendment"
* Rex Raptor, a recurring character in the 4kids version of Yu-Gi-Oh!
* Rex Salazar, the main title character from the animated show Generator Rex
* Rex Stalker, character in the cartoon My Pet Monster
* Rex, the title character in the claymation series Rex the Runt
* Rex, a character in the Canadian animated series Animal Mechanicals
* Captain Rex, the clone trooper captain who served as General Anakin Skywalker's second-in-command in the series Star Wars: The Clone Wars

### Live-action television series

* Rex Balsom, a character on the soap opera One Life to Live
* Rex Brady, a character on the soap opera Days of Our Lives
* Rex Buckland, a character in the series Charmed
* Rex (police dog), a fictional character from the police drama television series Inspector Rex
* Rex (Slovak TV series), a 2017 series based on the Austrian original
* Rex Van de Kamp, a character in the series Desperate Housewives
* Rex Britten, a character in the series Awake
* Rex Powers, a dummy in the series Victorious
* Rex, a canine character in the Canadian police procedural drama series Hudson & Rex
* Rex Mohs, a character from Scott the Woz

### Other fiction

* Metal Gear REX, a mecha from the video game Metal Gear Solid
* Rex the Wonder Dog, a DC Comics superhero dog
* Rex Fury, one of the main antagonists from the video game Lego City Undercover
* Rex Morgan, M.D., a comic strip and its title character
* Rex, the main protagonist and player character from the video game Xenoblade Chronicles 2
* Lord Rex, a super evolve Vivosaur character from the sequel video game Fossil Fighters: Champions
* Rex Mason, a DC Comics superhero known as Metamorpho
* Rex, a main character in the franchise Dinosaur King

## Music

* Rex (musical), a stage musical, with music by Richard Rodgers and lyrics by Sheldon Harnick
* Rex (band), an alternative rock band
* Rex (Live at the Fillmore), a 2008 album by Keller Williams, Keith Moseley and Jeff Austin
* Rex Records (disambiguation), several record companies
* Rex Orange County, an English recording artist and songwriter

## People

* Rex (given name), for people with the given name
* Rex (surname), for people with the surname
* Rex (artist), American gay pornographic artist
* Rex (singer), Li Xinyi (born 1998), Chinese singer and songwriter
* Mad Dog Rex, professional wrestler from All-Star Wrestling

## Places

* Rex, Georgia, an unincorporated community in the United States
* Rex, North Carolina, a census-designated place in the United States
* Rex River, Washington, United States
* Mount Rex, an isolated mountain in Antarctica

## Transportation
### Air

* Dudek Rex, a Polish paraglider design
* Rex Airlines, an Australian airline
* The IATA airport code for the General Lucio Blanco International Airport in Reynosa, Mexico
* Reporting name for the Kawanishi N1K Japanese Fighter

### Land

* BMW i3 REx, range extender variant of the all-electric BMW i3
* Subaru Rex, a Japanese Kei car
* Subaru Impreza WRX, a car referred to as "Rex"
* Rex-Acme, a premier British motorcycle company of early 1900s, originally Rex
* Rex (automobile) of Detroit, c. 1914
* Rex-Simplex and Rex, brand names used by the German company Hering & Richard which produced motor vehicles between 1901 and 1923

### Sea

* SS Rex, an Italian luxury ship, sunk by Allied bombers off the coast of Slovenia in 1944
* SS Rex, a floating casino off the coast of Southern California from the late 1930s to the late 1940s, run by mobster Anthony Cornero

## Other uses

* Rex (krewe), the Rex Organization, an old-line Mardi Gras krewe
** Rex, king of the New Orleans Mardi Gras Carnival
* Rex Architecture P.C., an architecture and design firm based in New York City, United States
* Rex 84, a plan by the United States to test their ability to detain large numbers of American citizens
* Rex (chair), a foldable chair
* Rex, the dinosaur mascot of the Calgary Dinos athletic teams at the University of Calgary
* MP412 REX, a Russian handgun
* REX, the Regents External Degree program, a former name of Excelsior College
* Rex Book Store, a educational book publisher and bookstore chain in the Philippines
* Rex Center, a former building in Lowell, Massachusetts
* Oligosaccharide reducing-end xylanase, an enzyme
* REX (New Horizons), a radio science experiment on the Pluto flyby space probe