Cray YMP Model D Range

The Cray-YMP range of computers were manufactured from 1989 until 1994. Around 200 of these machines were manufactured, and many customers migrated their workload from the Cray-XMP to a Cray-YMP. Like the Cray-XMP, the Cray-YMP were available with multiple processor configurations of 2, 4, 8 processors. The early machines used the same Model-D Input-Output subsystem as the XMP range. The Cray-YMP runs on UNICOS a UNIX operating system.

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