Beaverton, Oregon: Matrix Publishers, Inc. 1981. xii, 387,  pages. 8 1/2 x 11 inches. Publisher's printed grey/red and black wrappers. Overall general wear, previous owner's sticker on front wrapper. Generally bright and clean internally. Good. Wraps. 
This manual was designed to provide a relatively formal introduction to the Rockwell AIM-65 microcomputer.
"The Rockwell AIM-65 computer was a development computer based on the MOS Technology 6502 microprocessor introduced in 1976. The AIM-65 was essentially an expanded KIM-1 computer. Available software included a monitor with line at a time assembler/disassembler, BASIC interpreter, assembler, Pascal, PL/65, and FORTH development system. Available hardware included a floppy disk controller and a backplane for expansion." (wikipedia).