This manual is a must-have for any owner of a Commodore 64 computer. It is a comprehensive guide to data file programming and is written in clear and concise English.

The book was published by Wiley Press in 1985 and is a valuable resource for anyone looking to expand their knowledge of computing and programming. It is suitable for both beginners and experienced users and is an excellent reference guide for those looking to explore the full potential of their Commodore 64.