A. S. · A. Singer · Andrew C. Singer · David Andrew Singer
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Elementary BASIC: Teach yourself BASIC by solving the mysteries of Sherlock Holmes - As Chronicled by John H.Watson | 978-0-00-636629-4 (0-00-636629-5) | 1983 | Henry Ledgard |
| From Baker Street to Binary: An Introduction to Computers and Computer Programming | 978-0-07-036983-2 (0-07-036983-6) | 1983 | Henry F. Ledgard · Patrick E. McQuaid |