The RSX-11M Realtime Operating System can be used on any DEC PDP-11 computer(*) ....

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(*) The minimum configuration is a 16K PDP-11/10 with a Teletype (Teletype is a registered trademark of the Teletype Corporation) or LA30 for the console terminal; one RK disk drive? which is the system distribution medium; a KW11-L/P for the system clock; a hardware bootstrap loader, and either one additional RK disk drive, a DECtape or cassete.