 The initial shipment was for OS/2 and included most ANSI-G features and many new PL/I features.Subsequent releases covered additional platforms (MVS, VM, OS/390, AIX and Windows -although support for Windows has since been withdrawn) and continued to add functions to make PL/I fully competitive with other languages offered on the PC (particularly C and C++) in areas where it had been overtaken.The corresponding "IBM Language Environment" supports inter-operation of PL/I programs with Database and Transaction systems, and with programs written in C, C++, and COBOL, the compiler supports all the data types needed for intercommunication with these languages.