Up for sale is a vintage IBM System/360 Principles of Operation Systems Reference Library (SLR) Revision June 1964 manual. This rare find is a must-have for any vintage computing enthusiast. The manual contains valuable information on the operation of the IBM System/360.  It is a great piece of history that is perfect for collectors and researchers alike. Don't miss out on this opportunity to own a piece of computing history!  Form A22-6821-1, File No. S360-01.

It is in good condition considering age (no writing, no damage to any of its  approximate 168 pages).  See photos for examples that include black and white photos, flowcharts, and diagrams.  Pages are whiter than shown in photos.  Ships media U.S. Only.  No International.

S&H consists of packaging, invoice, time and travel plus actual cost when applicable.  Smoke-free.  See other IBM items listed.  I will answer all questions when possible.  Thank you for looking. Will combine shipping on multiple purchases. Just let me know before you pay so I can adjust invoice.