dBASE was the first widely used database management system or DBMS for microcomputers, published by Ashton-Tate for CP/M, and later on the Apple II, Apple Macintosh and IBM PC under DOS where it became one of the best-selling software titles for a number of years. dBASE was never able to transition successfully to Microsoft Windows and was eventually displaced by newer products like Paradox, Clipper, and FoxPro. dBASE was sold to Borland in 1991, which sold the rights to the product line in 1999 to the newly-formed dBASE Inc.
Starting in the mid 1980's many other companies produced their own dialects or variations on the product and language. These included FoxPro (now Visual FoxPro), Quick-Silver, Clipper, Xbase++, FlagShip, and Harbour. Together these are informally referred to as xBase or XBase.
dBASE's underlying file format, the dbf file, is widely used in many other applications needing a simple format to store structured data.
dBASE was licensed to users for a term of fifty years in the unlikely event that a user would use their copy of dBASE for a long period of time.