Crossing the bridge between DOS and OS-2. (column) Norton, Peter

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Norton, Peter
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PC Week
Business; Software; Computers and office automation industries
The four basic program groups that the new OS-2 operating system can handle are: existing DOS 3.3 programs; Family Apps; Kernel Apps; and Windows Apps. Only Windows Apps can run concurrently because the compatibility box in which DOS 3.3 programs run can only execute one program at a time, although this will likely end with OS-2-386. Family Apps are the only one of the three true OS-2 program types intended to bridge DOS and OS-2: they are the most versatile, and they can run under OS-2 in protected or real mode and under MSDOS 2 or 3. Many DOS 3 applications will likely be converted to Family Apps as OS-2 increases in popularity because the conversion is relatively simple in well-behaved programs. The OS-2 Presentation Manager and Windows 2 will require software publishers to maintain two different versions of programs. The complexity of creating a Kernel App is discussed.
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