HP 1652B Getting Started Manual page 78

Printing History
New editions are complete revisions of the manual. Update packages,
which are issued between editions, contain additional and replacement
pages to be merged into the manual by the customer. The dates on the
title page change only when a new edition or a new update is published.
A software code may be printed before the date; this indicates the version
level of the software product at the time of the manual or update was
issued. Many product updates and fixes do not require manual changes
and, conversely, manual corrections may be done without accompanying
product changes. Therefore, do not expect a one to one correspondence
between product updates and manual updates.
Edition 1
November 1989 0165240902