sentences:  In the mid 1980s, STSC developed the "APL*Plus/Unix" interpreter, a full 32-bit interpreter which was the basis of further APL development, notably "APL*Plus/386", which was later available for Intel 386 class machines and higher.Arguably, the "APL*Plus/386" interpreter fostered the exodus of APL applications from mainframe to PC environments, as the hardware and software were finally correctly matched to facilitate a straightforward migration of medium- to large-sized applications away from mainframes.In the mid 1980s, STSC released an APL compiler for its APL*Plus add-on for the IBM VSAPL License Program Product.