Description: An original 1981 spiral-bound technical manual titled "The DOS Manual," covering the Apple Disk Operating System (DOS 3.3). This foundational document provides comprehensive instructions on file management, disk initialization, and the complete command set for the Apple II series. It includes detailed explanations for essential commands like CATALOG, BRUN, and EXEC, as well as the technical procedures for managing the Disk II interface.

Manufacturer: Apple Computer Inc. (Cupertino, California)

Manufactured In: USA

Condition Description: This is an original vintage spiral-bound manual. The plastic binding is intact and the covers show age-appropriate handling wear, light scuffing, and minor corner rounding. The interior pages are clean, fully legible, and free from major staining or tears, serving as a well-preserved artifact of early computing history.

True Condition: See pictures for true condition.

Model Number: 1981 Revision (DOS 3.3)

Extra Notes: This manual is famous among collectors for its "Peeking and Poking" section and the detailed memory maps in the appendices. It is a must-have for completing an original Apple II Plus or early IIe system set.