A51 may refer to:
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Area 51
Area 51 is the common name of a highly classified United States Air Force (USAF) facility within the Nevada Test and Training Range in southern Nevada, north-northwest of Las Vegas.
A remote detachment administered by Edwards Air Force B ...
, the nickname for a military base in Nevada that is the subject of many conspiracy theories
*
A51 Terrain Park (Colorado) A51 may refer to:
* Area 51, the nickname for a military base in Nevada that is the subject of many conspiracy theories
* A51 Terrain Park (Colorado), a terrain park in Keystone, Colorado
* A51 road (England) A51 may refer to:
* Area 51, the nickn ...
, a terrain park in Keystone, Colorado
*
A51 road (England) A51 may refer to:
* Area 51, the nickname for a military base in Nevada that is the subject of many conspiracy theories
* A51 Terrain Park (Colorado), a terrain park in Keystone, Colorado
* A51 road (England), a road connecting Kingsbury and Cheste ...
, a road connecting Kingsbury and Chester
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A51 motorway (France)
The A51 autoroute is a partly completed motorway in southeast France. It currently exists as two sections separated by a gap of approximately 85 km, the northern section sometimes referred to as the A51N.
It is the long-term project to conn ...
, a road connecting Marseille and Grenoble
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A5/1
A5/1 is a stream cipher used to provide over-the-air communication privacy in the Global System for Mobile Communications, GSM Cell phone, cellular telephone standard. It is one of several implementations of the A5 security protocol. It was initial ...
, in cryptography, a stream cipher used in GSM cellular networks
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Samsung Galaxy A51
The Samsung Galaxy A51 is a mid-range Android smartphone manufactured by Samsung Electronics as part of its Galaxy A series. It was announced and released in December 2019. The phone has a Super AMOLED FHD+ 6.5in display, a 48MP wide, 12 ...
, a smartphone released in 2019
* A51, one of the Encyclopaedia of Chess Openings codes for the
Budapest Gambit
The Budapest Gambit (or Budapest Defence) is a chess opening that begins with the moves:
:1. b:Chess Opening Theory/1. d4, d4 b:Chess Opening Theory/1. d4/1...Nf6, Nf6
:2. b:Chess Opening Theory/1. d4/1...Nf6/2. c4, c4 b:Chess Opening Theory/1. d ...
in chess
* A-51, a
Namibian hip hop band
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