The last version of QuickBASIC was version 4.5 (1988), although development of the Microsoft BASIC Professional Development System (PDS) continued until its last release of version 7.1 in October 1990.
Poslední verzí QuickBasicu byla 4.5 (1988), nicméně vývoj Microsoft Basic Professional Development System (PDS) pokračoval až do verze 7.1 (červen 1990).