OS/2 2.0 provides the capability for Windows applications to run under OS/2 2.0, using the multiple DOS sessions feature. This support allows applications written for Windows Version 3.0 (standard and real mode applications) and previous Windows versions to coexist and run in the same session.
Running Windows applications as protect-mode tasks also allows these applications to have full preemptive multitasking between Windows applications, DOS applications, and OS/2 applications. The OS/2 2.0 Master Help Index has detailed information about Windows application support.