Under &os2;, programs run in sessions. A session consists of one or more processes and can run in a window or in full-screen mode. In addition, every session has a special type, depending on the operating system that a program was written for.

Even though programs are normally written to run under a specific operating system, &os2; has built-in support to be able to execute programs for other operating systems too. &os2; supports the following session types:

For more information, select from the following list: