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An array is a systematic arrangement of similar objects, usually in rows and columns.

Things called an array include:

Music

• In twelve-tone and serial composition, the presentation of simultaneous twelve-tone sets such that the sums of their horizontal segments form a succession of twelve-tone aggregates
• Array mbira, a musical instrument
• Spiral array model, a music pitch space

Science

Astronomy

A telescope array, also called astronomical interferometer.

Biology

• Various kinds of multiple biological arrays called microarrays
• Visual feature array, a model for the visual cortex

Computer science

Generally, a collection of same type data items that can be selected by indices computed at run-time, including:

• Array (data structure), an arrangement of items at equally spaced addresses in computer memory
• Array (data type), used in a programming language to specify a variable that can be indexed
• Associative array, an abstract data structure model composed of key-value pairs, often implemented as a hash table or search tree

or various kinds of the above, such as:

• Bit array or bit vector
• Dynamic array, allocated at run time
• Jagged array, an array of arrays of which the member arrays can be of different lengths
• Parallel array of records, with each field stored as a separate array
• Sparse array, with most elements omitted, to store a sparse matrix
• Variable-length array

or various related concepts:

• Array programming, using matrix algebra notation in programs (not the same as array processing)
• Array slicing, the extraction of sub-arrays of an array

or also:

• Global Arrays, a library for parallel processing
• Intel Array Visualizer, a piece of scientific graphics software

Mathematics and statistics

• A standard array in coding theory
• An array or matrix (mathematics)
  • a Costas array
  • a Monge array
• A holor
• In statistics, arrays are a name for some kinds of Category:Experimental design
• Intersection array a concept of category theory

Technology

Computing

• Array data structure, an arrangement of data in computer memory
• Asynchronous array of simple processors
• Disk array, such as the RAID
• Gate array, including a field-programmable gate array (FPGA)
• ICL Distributed Array Processor, an array processor for the ICL
• Integrated circuit packages:
  • Ball grid array
  • pin grid array
  • land grid array
• Processor array
• Programmable Array Logic (PAL), a systematic way to implement Boolean functions
• Reconfigurable datapath array, a flexible data processing architecture
• Systolic array, a hardware architecture
• Transistor array, an integrated circuit
• Video Graphics Array (VGA), a display adapter and many variants thereof
• Wi-Fi array, a wireless networking device

Other technologies

• Antenna array
• Array gain, a telecommunications parameter
• Array processing of multichannel signals (not to be confused with array programming)
• Color filter array, placed over an imaging array
• Field emitter array, an electron source
• Halbach array, an arrangement of magnets
• Linear diode array used in image scanners
• Microphone array
• Parametric array of transducers
• Phased-array optics
• Photovoltaic array
• Staring array, an imaging sensor
• Towed array sonar

Other

• A Commission of Array, a commission for mustering a militia
• ARRAY, an independent film distribution company
• Array Networks, a computer networking company
• Array Collective, a Belfast-based artist-activist collaborative project

• Arrays