PDP-11 Architecture Handbook (1983) PDP-11 Microcomputer Interfaces Handbook (1983) PDP-11 Micro/PDP-11 Handbook (1983) PDP-11 Unibus PDP-11 Handbook 11/84, 11/44, 11/24 (1985) In addition, there are: PDP-11 Programming Card (1975) VT220 Installation Guide (1984) VT220 Programmer Pocket Guide (1984) They are all in excellent shape. Owner is willing to send via USmail for free. I saw a picture of them and they are in mint condition. Email me off-list if interested. Best, J