Amstrad Business Computing (ABC) was included as free 'bonus' in Amstrad Computer User issues 12-1985 through 8-1986. The additional pages are found in the middle of the ACU magazine, and are numbered (independently of the other pages) using roman page numbers. The business part typically consists of around 20-40 pages.
- Amstrad Business Computing Issue 1 - ACU Issue 12, 1985
- Amstrad Business Computing Issue 2 - ACU Issue 1, 1986
- Amstrad Business Computing Issue 3 - ACU Issue 2, 1986
- Amstrad Business Computing Issue 4 - ACU Issue 3, 1986
- Amstrad Business Computing Issue 5 - ACU Issue 4, 1986
- Amstrad Business Computing Issue 6 - ACU Issue 5, 1986
- Amstrad Business Computing Issue 7 - ACU Issue 6, 1986
- Amstrad Business Computing Issue 8 - ACU Issue 7, 1986
- Amstrad Business Computing Issue 9 - ACU Issue 8, 1986
The last free issue was ABC Issue 9, which announced (on page III) that ABC will now continue as separate magazine, named Amstrad Professional Computing (APC).