dBASE II was the first version of dBASE, a 16-bit command-driven program for CP/M and subsequently DOS. In 1984, dBASE III upgraded the DOS version with more features and support for larger databases.

The dBASE data file extension. The format changed between dBASE II and dBASE III. All subsequent versions are compatible with the dBASE III format. THIS DEFINITION IS FOR PERSONAL USE ONLY.