UNIX time-sharing system: UNIX programmer's manual by Bell Telephone Laboratori,

UNIX and Linux System Administration Handbook (5th Edition) - GOOD

Sybex Programming the 6502 Third Edition Rodnay Zaks Vintage Computer Book 1980

Unix Programmer's Manual Reference Guide & Supplementary Docs 1984 UC Berkeley

UNIX Time Sharing System PROGRAMMER'S MANUAL: V. 2 By Bell Laboratories 1983

The Design And Implementation Of The 4.3BSD Unix Operating System Hardcover

Programming the 6502 by Rodnay Zaks Sybex Publishing Vintage Computer Book

Programming a Microcomputer : 6502 by Caxton Foster (1978) PB-2nd print Ex-Lib