This easy-to-follow. self~nstructional guide shows you how to program and maintain data files for your Commodore 64, Commodore Pet, or CBM, and use them to keep track of billings, inventories, and expenses ... catalog material and mailing lists ... manipulate numerical and statistical information ... and much more.

You'll learn the principles of file organization, then go on to more advanced programming techniques. Assisted by dozens of sample programs and practical advice, you'll find out how to write your own data file programs, use your tape recorder or disk drive as an alternative way to store information, modify programs you've already purchased, even adapt programs using data files found in magazines and other sources.