History preservation in a computer storage system

Data processing: database and file management or data structures – File or database maintenance – Database archive

Reexamination Certificate

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Reexamination Certificate

active

07979397

ABSTRACT:
A method for keeping track, in an electronic data processing system, of when references made to an element that is stored in memory have all been removed, the method being designed to deal with failures in a manner that does not falsely conclude there are no references.

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