Organizing A Diskette File - IBM 5110 User Manual

148
Organizing a Diskette File
An important part of any data processing job is file organization. File
organization is the arrangement of records in a file.
Sequential Access Files
Sequential access files are processed consecutively. For example, an
employee master file contains information needed for various reports
concerning each employee, such as payroll checks. Because checks
are usually processed in order by employee number, records are
processed in order. The lowest employee number is processed first
and so on until the last record, the highest employee number, is
processed.
Sequential processing means records are processed one after another
in the order they occur in the file. To process only certain records all
records must be processed, or at least read up to the last record to be
processed.