Sinclair ZX81 Computer Book: The ZX81 Pocket Book - Trevor Toms / Phipps Assoc

Usborne Computer Spacegames Book, Hard Backed Spectrum Acorn CBM ZX81 1983

'ZX81 BASIC Programming' Vintage Computer Book Sinclair 2nd Edition 1981

An Introduction To Operating Systems By Harvey M. Deitel

Teletype Bulletin 310B Vol 1 Technical Manual 33 Teletypewriter Sets 1962 - 1969

ZX Spectrum Basic Manual Introduction Book & Ephemera 1982 First Edition

Sinclair ZX81 Programming for Real Applications 1981 Pback Book By Randle Hurley

HP 82941A BCD Installation And Theory Of Operation Manual