This vintage book set from IBM includes three books covering DOS, BASIC, and Guide to Operations. It is a great addition to any collection for those interested in the history of computing. The books are in good condition and provide valuable insights into the early days of desktop computing. They are compatible with IBM desktop computers and come in a floppy disk format. The books are written in English and were produced in the United States. This set is a must-have for any technology enthusiast or collector.