A0, A-0, A
0, or a
0 may refer to:
* 101 A0 and 103 A0, two versions of the German
Heinkel Tourist
The Heinkel Tourist is a motor scooter that was made by Heinkel Flugzeugwerke from 1953 to 1965. More than 100,000 were manufactured and sold.The Encyclopedia of the Motorcycle: Heinkel TouristThe Ultimate Motorcycle Book: Scooters — Heinke ...
moped
*
A0 paper size, an international ISO 216 standard paper size (841 × 1189 mm), which results in an area very close to 1 m
2
*
A0 highway (Zimbabwe), a highway which orbits Zimbabwe
* A0, the lowest
A (musical note)
A or La is the sixth note and the tenth semitone of the fixed-do solfège.
Its enharmonic equivalents are B (B double flat) which is a diatonic semitone above A and G (G double sharp) which is a diatonic semitone below A.
"A" is generally us ...
note on a standard piano
* A0, a
climbing grade
In rock climbing, mountaineering, and other climbing disciplines, climbers give a grade to a climbing route or boulder problem, intended to describe concisely the difficulty and danger of climbing it. Different types of climbing (such as spo ...
* A00,
Irregular chess opening
In chess, irregular opening is a traditional term for any opening considered unusual or unorthodox. In the early 19th century it was used for any opening not beginning with 1.e4 e5 (the Open Game) or 1.d4 d5 (the Closed Game). As opening theory h ...
s code in the Encyclopaedia of Chess Openings
*
A-0 Geyser, a geyser in Yellowstone National Park
*
A-0 System, an early compiler related tool developed for electronic computers
*
L'Avion
Elysair SAS, operating as L'Avion (French for "The plane"), was an airline headquartered in Paray Vieille Poste, France, near Wissous. It operated business class-only long-haul service between Orly Airport, Paris and Newark Liberty Internationa ...
, IATA airline designator for the French airline
* Characters of type A
0, an older term for algebraic
Hecke character In number theory, a Hecke character is a generalisation of a Dirichlet character, introduced by Erich Hecke to construct a class of
''L''-functions larger than Dirichlet ''L''-functions, and a natural setting for the Dedekind zeta-functions and ce ...
s
* a
0, the accepted mathematical symbol for the
Bohr radius
The Bohr radius (''a''0) is a physical constant, approximately equal to the most probable distance between the nucleus and the electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an ...
* Haplogroup A00 and A0; see
Y-chromosomal Adam and
Haplogroup A (Y-DNA)
Haplogroup A is a human Y-chromosome DNA haplogroup, which includes all living human Y chromosomes. Bearers of extant sub-clades of haplogroup A are almost exclusively found in Africa (or among descendants of populations which have recently le ...
* A0, a subdivision in
stellar classification
* A0, sometimes written as 0xA0, is the hexadecimal representation of
non-breaking space in various character encoding standards
*
A0 road (Sri Lanka), an A-Grade road in Sri Lanka
Airplanes and rockets
* A-0, a 1943 Pre-production model of the German
Walter HWK 509 liquid-fuel bipropellant rocket engine
* A-0, a 1938 variant of the German
Siebel Si 204
The Siebel Si 204 was a small twin-engined transport and trainer aircraft developed in World War II. It was based on the Fh 104 Hallore. Originally designed in response to an Ministry of Aviation development order for a small civil transport ai ...
transport and trainer aircraft
* He 177 A-0, a pre-production series of the 1942 German
Heinkel He 177
The Heinkel He 177 ''Greif'' (Griffin) was a long-range heavy bomber flown by the ''Luftwaffe'' during World War II. The introduction of the He 177 to combat operations was significantly delayed, by both problems with the development of its ...
heavy bomber
* Hs 126A-0, a variant of the 1937 German
Henschel Hs 126
The Henschel Hs 126 was a German two-seat reconnaissance and observation aircraft of World War II that was derived from the Henschel Hs 122. The pilot was seated in a protected cockpit under the parasol wing and the gunner in an open rear cockp ...
reconnaissance aircraft
* Ju 87 A-0, a variant of the 1936 German
Junkers Ju 87 dive bomber aircraft
* Me 210A-0, a pre-production variant of the 1943 German
Messerschmitt Me 210
The Messerschmitt Me 210 was a German heavy fighter and ground-attack aircraft of World War II. Design started before the war, as a replacement for the Bf 110. The first examples were ready in 1939, but they proved to have unacceptably poor ...
heavy fighter aircraft
Submarine
* ''
Isaac Peral
Isaac Peral y Caballero (1 June 1851, in Cartagena – 22 May 1895, in Berlin), was a Spanish engineer, naval officer and designer of the Peral Submarine. He joined the Spanish navy in 1866, and developed the first electric-powered submarine whi ...
'' (A-0), a Spanish submarine
See also
*
AO (disambiguation)
{{Letter-Number Combination Disambiguation