Array

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

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:

or various kinds of the above, such as:
 * 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
 * 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

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