Other OSs from 1970s

• Alto OS
• OS/32

HP 2100 #

• ! HP 2100 DOS-M
• ! HP 2100 MTS
• ! HP 2100 DOS-III
• ! HP 2100 RTE
• ! HP 2100 RTE-II
• ! HP 2100 RTE-III

Data General Nova #

• ! Nova DOS
• ! Nova RDOS
• ! Data General AOS

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