Backronym in the context of "Commodore PET"

MESSENGER was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury's chemical composition, geology, and magnetic field. The name is a backronym for Mercury Surface, Space Environment, Geochemistry, and Ranging, and a reference to the messenger god Mercury from Roman mythology.

MESSENGER was launched aboard a Delta II rocket in August 2004. Its path involved a complex series of flybys – the spacecraft flew by Earth once, Venus twice, and Mercury itself three times, allowing it to decelerate relative to Mercury using minimal fuel. During its first flyby of Mercury in January 2008, MESSENGER became the second mission, after Mariner 10 in 1975, to reach Mercury.

Basic English (a backronym for British American Scientific International and Commercial English) is a controlled language based on standard English, but with a greatly simplified vocabulary and grammar. It was created by the linguist and philosopher Charles Kay Ogden as an international auxiliary language, and as an aid for teaching English as a second language. It was presented in Ogden's 1930 book Basic English: A General Introduction with Rules and Grammar.

The first work on Basic English was written by two Englishmen, Ivor Richards of Harvard University and Charles Kay Ogden of the University of Cambridge in England. The design of Basic English drew heavily on the semiotic theory put forward by Ogden and Richards in their 1923 book The Meaning of Meaning.

Perl is a high-level, general-purpose, interpreted, dynamic programming language. Though Perl is not officially an acronym, there are various backronyms in use, including "Practical Extraction and Reporting Language".

Perl was developed by Larry Wall in 1987 as a general-purpose Unix scripting language to make report processing easier. Since then, it has undergone many changes and revisions. Perl originally was not capitalized and the name was changed to being capitalized by the time Perl 4 was released. The latest release is Perl 5, first released in 1994. From 2000 to October 2019 a sixth version of Perl was in development; the sixth version's name was changed to Raku. Both languages continue to be developed independently by different development teams which liberally borrow ideas from each other.

In multiplayer online games, a MUSH (a backronymed variation on MUD most often expanded as Multi-User Shared Hallucination, though Multi-User Shared Hack, Habitat, and Holodeck are also observed) is a text-based online social medium to which multiple users are connected at the same time. MUSHes are often used for online social interaction and role-playing games, although the first forms of MUSH do not appear to be coded specifically to implement gaming activity. MUSH software was originally derived from MUDs; today's two major MUSH variants are descended from TinyMUD, which was fundamentally a social game.MUSH has forked over the years and there are now different varieties with different features, although most have strong similarities and one who is fluent in coding one variety can switch to coding for the other with only a little effort. The source code for most widely used MUSH servers is open source and available from its current maintainers.

A primary feature of MUSH codebases that tends to distinguish it from other multi-user environments is the ability, by default, of any player to extend the world by creating new rooms or objects and specifying their behavior in the MUSH's internal scripting language.

The Scout family of rockets were American launch vehicles designed to place small satellites into orbit around the Earth. The Scout multistage rocket was the first orbital launch vehicle to be entirely composed of solid fuel stages. It was also the only vehicle of that type until the successful launch of the Japanese Lambda 4S in 1970.

The original Scout (a backronym for Solid Controlled Orbital Utility Test system) was designed in 1957 at the NACA, at Langley center. Scout launch vehicles were used from 1961 until 1994. To enhance reliability the development team opted to use "off the shelf" hardware, originally produced for military programs. According to the NASA fact sheet:

An Amber alert (alternatively styled AMBER alert) or a child abduction emergency alert (SAME code: CAE) is a message distributed by a child abduction alert system to ask the public for help in finding abducted children. The system originated in the United States.

The Amber alert was created in reference to 9-year-old Amber Rene Hagerman, who was abducted in Arlington, Texas, on January 13, 1996, and found murdered four days later. Alternative regional alert names were once used; in Georgia, "Levi's Call" (in memory of Levi Frady); in Hawaii, "Maile Amber Alert" (in memory of Maile Gilbert); in Arkansas, "Morgan Nick Amber Alert" (in memory of Morgan Nick); in Utah, "Rachael Alert" (in memory of Rachael Runyan); and in Idaho, "Monkey's Law" (in memory of Michael “Monkey” Joseph Vaughan). Although the system was named for Hagerman, "AMBER" officially stands for "America's Missing: Broadcast Emergency Response", an example of a backronym.

PowerPC (with the backronym Performance Optimization With Enhanced RISC – Performance Computing, sometimes abbreviated as PPC) is a reduced instruction set computer (RISC) instruction set architecture (ISA) created by the 1991 Apple–IBM–Motorola alliance, known as AIM. PowerPC, as an evolving instruction set, has been named Power ISA since 2006, while the old name lives on as a trademark for some implementations of Power Architecture–based processors.

Originally intended for personal computers, the architecture is well known for being used by Apple's desktop and laptop lines from 1994 until 2006, and in several videogame consoles including Microsoft's Xbox 360, Sony's PlayStation 3, and Nintendo's GameCube, Wii, and Wii U. PowerPC was also used for the Curiosity and Perseverance rovers on Mars and a variety of satellites. It has since become a niche architecture for personal computers, particularly with AmigaOS 4 implementations, but remains popular for embedded systems.

Nasty Crew (commonly stylised as N.A.S.T.Y., a backronym for Natural Artistic Sounds Touching You) was a British grime crew from East London, with its members primarily from Newham. The group was founded by DJ Marcus Nasty and MCs Sharky Major and Stormin in 1999, and its membership underwent frequent changes in the following years, with most artists forming or joining successor crews by 2006. It is regarded as a pioneering collective within grime music history and several of its former members have charted in the United Kingdom, including Kano, Ghetts, D Double E, and Jammer.

The BRIT Awards (often simply called the BRITs) are the British Phonographic Industry's annual popular music awards. The name was originally a shortened form of "British", "Britain", or "Britannia" (in the early days the awards were sponsored by Britannia Music Club), but subsequently became a backronym for British Record Industry Trusts Show. The awards were first held in 1977 and originated as an annual event in 1982 under the auspices of the British record industry's trade association, the BPI. In 1989, they were renamed The BRIT Awards. Mastercard has been the long-term sponsor of the event. In addition, an equivalent awards ceremony for classical music, called the Classic BRIT Awards, was held annually between 2000 and 2013, before being revived in 2018 but has not been held since.

The highest profile music awards ceremony in the UK, the BRIT Awards have featured some of the most notable events in British popular culture, such as the final public appearance of Freddie Mercury, the Jarvis Cocker protest against Michael Jackson, the height of a high-profile feud between Oasis and fellow Britpop band Blur, the Union Jack dress worn by Geri Halliwell of the Spice Girls, and a Chumbawamba member throwing a bucket of iced water over then-Deputy Prime Minister John Prescott. These moments took place in the 1990s when the ceremony had a reputation for being "a little shambolic, unpredictable and, at times, anarchic," since then it has "evolved into a more polished, sanitised affair".

The Tea Party protests were a series of protests throughout the United States that began in early 2009. The protests were part of the larger political Tea Party movement. Most Tea Party activities have since been focused on opposing efforts of the Obama administration, and on recruiting, nominating, and supporting candidates for state and national elections.The name "Tea Party" is a reference to the Boston Tea Party, whose principal aim was to protest taxation without representation. Tea Party protests evoked images, slogans and themes from the American Revolution, such as tri-corner hats and yellow Gadsden "Don't Tread on Me" flags. The letters T-E-A have been used by some protesters to form the backronym "Taxed Enough Already".

Commentators promoted Tax Day events on various blogs, Twitter, and Facebook, while the Fox News Channel regularly featured televised programming leading into and promoting various protest activities. Reaction to the tea parties included counter-protests expressing support for the Obama administration, and dismissive or mocking media coverage of both the events and their promoters.

PHP is a general-purpose scripting language geared towards web development. It was created by Danish-Canadian programmer Rasmus Lerdorf in 1993 and released in 1995. The PHP reference implementation is now produced by the PHP Group. PHP was originally an abbreviation of Personal Home Page, but it now stands for the recursive backronym PHP: Hypertext Preprocessor.

PHP code is usually processed on a web server by a PHP interpreter implemented as a module, a daemon or a Common Gateway Interface (CGI) executable. On a web server, the result of the interpreted and executed PHP code—which may be any type of data, such as generated HTML or binary image data—can form the whole or part of an HTTP response. Various web template systems, web content management systems, and web frameworks exist that can be employed to orchestrate or facilitate the generation of that response. Additionally, PHP can be used for programming tasks outside the web context, though non-web uses are rare. PHP code can also be directly executed from the command line.

Carbonless copy paper (CCP), also called non-carbon copy paper or NCR paper (which stands for "no carbon required", a backronym derived from its creator National Cash Register), is a type of coated paper designed to transfer information written on the top sheet to the sheets beneath. It was developed by chemists Lowell Schleicher and Barry Green, as an alternative to carbon paper and is sometimes misidentified as such.

Carbonless copying provides an alternative to the use of carbon copying. Carbonless copy paper has micro-encapsulated dye or ink on the back side of the top sheet, and a clay coating on the front side of the bottom sheet. When pressure is applied (from writing or impact printing), the dye capsules rupture and react with the clay to duplicate the markings made to the top sheet. Intermediary sheets, with clay on the front and dye capsules on the back, can be used to create multiple copies; this may be referred to as multipart stationery.