dBase II was the first widely used database management system (DBMS) for microcomputers, published by Ashton-Tate for CP/M, and later on the Apple II, Apple Macintosh, UNIX, VMS, and IBM PC under DOS where it and its successors dBase III and dBase IV (there was no dBase I) became one of the best-selling software titles for a number of years. dBase wasn't successfully ported to Microsoft Windows for some time, and gradually lost market share to competitors such as Paradox, Clipper, FoxPro, and M… (More on Dbase)