| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1981 | 978-0-912985-00-8 | Don Worth · Pieter Lechner | Beneath Apple DOS |
| 1985 | 978-0-912985-01-5 | James Fielding Sather | Understanding the Apple II |
| 1984 | 978-0-912985-05-3 | Don D. Worth · Pieter M. Lechner | Beneath Apple Prodos |