Block
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(1) In programming languages, a compound statement that coincides with the scope of at least one of the declarations contained within it. A block may also specify storage allocation or segment programs for other purposes. (I)
(2) A string of data elements recorded or transmitted as a unit. The elements may be characters, words or physical records. (T)
(3) A collection of contiguous records recorded as a unit. Blocks are separated by interblock gaps and each block may contain one or more records. (A)