This vintage manual is a must-have for any collector of computing memorabilia. Reprint 1967, Reissue dated 1968, this SPECTRA 70 RCA Tape Operating System (TOS)/Tape-Disc Operating System (TDOS), File Control Processor and Executive Communication Macros Reference Manual offers a glimpse into the early years of data processing. This reissued manual was made in the United States, and is a unique piece of history that showcases the evolution of computing technology. With its RCA brand and vintage classification, this manual is a rare find for any enthusiast. The manual is in its original state and has not been modified in any way. Whether you are a collector or simply interested in the history of computing, this manual is a valuable addition to any collection.

It is in nice condition considering age (no writing, no damage to any of its 250 plus pages). Has an aluminum slide binder clip. See photos for examples that include black and white photos, flowcharts, and diagrams. Pages are whiter than shown in some 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 RCA 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.