Description: An original, factory-sealed technical reference manual for the Apple Pascal Operating System. This foundational document covers the UCSD Pascal implementation for the Apple II and Apple III, including the Filer (disk management), Text Editor, Pascal Compiler, and 6502 Assembler. It details the revolutionary "P-Machine" architecture and the 512-byte block disk format that preceded ProDOS.

Manufacturer: Apple Computer Inc. (Cupertino, California)

Manufactured In: USA

Condition Description: New Old Stock (NOS). The manual remains in its original factory clear plastic shrink-wrap. The plastic has a small opening at the top, but the manual itself has never been removed. The binding is uncracked, and the internal pages are pristine, having been protected from light and handling since 1980.

True Condition: See pictures for true condition.

Model Number: Product #A2L0028 (030-0100-00)

Extra Notes: Apple Pascal was a professional-grade system used by developers to write complex software that DOS 3.3 couldn't handle. A near-sealed copy like this is a "museum-grade" artifact, highly sought after by collectors looking for the best possible surviving example of early Apple II documentation.