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=== Sequential versus direct ===
''Sequential'' access assumes that records can be processed only sequentially, as opposed to ''direct'' (or random) access. Some devices, such as [[magnetic tape data storage|magnetic tape]], naturally enforce sequential access, but it can be used as well on [[direct access storage device]]s (DASD), such as disk drives. In the latter case, a data set written with sequential access can be later processed in a direct manner.
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== Networking access methods ==
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