| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Understanding and Using MS-Dos/PC DOS | 978-0-314-96205-8 | 1986 | Laura B. Ruff |
| Understanding and Using M. S.-DOS/PC DOS: The First Steps | 978-0-314-50330-5 | 1989 | " |
| Understanding and Using Multimate | 978-0-314-96213-3 | 1986 | Laura Ruff |
| Understanding and Using Pfs: File/Report | 978-0-314-96215-7 | 1986 | Laura B. Ruff |
| Understanding and Using Pfs: Write | 978-0-314-96217-1 | 1985 | " |