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Computing (FOLDOC) dictionary (also found in English - English (Wordnet), English - Vietnamese)
descriptor
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operating system An integer, string or other small data
value which refers to one of several objects allocated to a
program by the operating system, usually the kernel. A
common example is a Unix file descriptor which is a small
integer that identifies an I/O channel. Another example is a
reference to an area of memory (e.g. shared memory).