Category: Three-letter acronym disambiguations The chemical compound acetylcholine, often abbreviated as ACh, was the first neurotransmitter to be identified. ... Achondroplasia is a type of genetic disorder that is a common cause of dwarfism. ... Achnashellach railway station is a railway station serving Achnashellach on the Dingwall and Skye Railway, in Wester Ross, Scotland. ... National Rail uses the BR double-arrow logo National Rail is a brand name describing the passenger rail service previously provided by British Rail, the now-defunct UK state-owned rail operator. ... Acholi (also Acoli, Shuli, Gang, Lwo) is a language primarily spoken by the Acholi people in the districts of Gulu, Kitgum and Pader, a region known as Acholiland in northern Uganda. ... ISO 639 is one of several international standards that lists short codes for language names. ... An IATA airport code, known by the IATA as an IATA location identifier or, simply, a location identifier [1], is a three-letter alphabetic code designating many airports around the world. ... The Automated Clearing House (ACH) is a nationwide electronic banking network that processes large volumes of both credit and debit transactions which are originated in batches. ... The TLA (three-letter acronym or three-letter abbreviation) is the most popular type of abbreviation in technical terminology, and is also very common in general language. ...