Abstract
Abstract We present a package of FORTRAN modules to perform general and efficient I/O operations in external sort, bin sort and related environments. A partition of a user logical record of length IRLU into NREC records of length IRL is carried out when IRLU exceeds the maximum permissible record length for a given computer and file organization. Efficient random direct access to a file requires that IRL be a multiple of the smallest addressable unit on a disk. Overcoming implied DO lists in I/O statements becomes significant in tight memory environments. Corresponding gains in execution times are discussed.
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