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In page List of operating systems:
"
- Unicos (the version of Unix designed for Cray Supercomputers, mainly geared to vector calculations)
- UTX-32 (Developed by Gould CSD (Computer System Division), a Unix-based OS that included both BSD and System V characteristics. It was one of the first Unix based systems to receive NSA's C2 security level certification.)[citation needed]
- Zenix, Zenith corporations Unix (a popular USA electronics maker at the time)[citation needed]
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