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Multiuser DOS
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==={{anchor|CDOS86|CPCDOS|CPCDOS3.2|CPCDOS4.1|CPCDOS4.11}}Concurrent PC DOS=== Concurrent DOS 3.2 (with BDOS 3.2) in 1984 was compatible with applications for CP/M-86 1.x, Concurrent CP/M-86 3.x and PC DOS 2.0.<!-- July 1984 ref specifies CPCDOS without version number, but mentions PC DOS 2.0 compatibility --><ref name="DRI_1984_MicroNotes3"/> It was available for many different hardware platforms. The version with an IBMβPC-compatible BIOS/XIOS was named Concurrent PC DOS 3.2. Kathryn Strutynski was the product manager for Concurrent PC DOS.
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