VPRS 12642 Subject Index Cards, Multiple Number System

This series of subject index cards was created to provide a quick method of locating file numbers if the subject matter of correspondence was known.The subject index consists of cards raised for each secondary heading on which was listed all the files raised on that subject. The first secondary card under each primary heading was, always "General", and this card was used when it was the only heading under a specific primary. It was also used when the subject matter for indexing was not specifically covered by another secondary heading.The information recorded on the cards, includes:Subject index headingsPrimary and secondary file registration numbersFile title