Atari ST Internals Abacus Books Vintage 1986 Computer Book Authoritative Guide

Atari ST BASIC Training Guide – Kampow & Szczepanowski (Abacus / Data Becker)

AmigaBASIC Inside and Out Book - Abacus Data Becker - Amiga Programming Guide

ATARI ST BASIC Training Guide by Abacus Software

The Advanced Machine Language book for the Commodore 64 by Abacus Software

AmigaBASIC Inside and Out Softcover Book from ABACUS DataBecker GMBH 1988 Spanik

Amiga for Beginners – Christian Spanik (Abacus / Data Becker, 1991)

Vintage The Anatomy Of The 1541 Disk Drive Book by Abacus Software - JD512