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![](timeline7.gif)
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![](bck-4.gif) ![](1973.gif) ![](fwd-4.gif) |
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![](photos/rsx11-t.jpg) |
May:
RSX-11D, a real-time operating system for
online data acquisition, monitoring and control
on the PDP-11, is introduced. |
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![](photos/rt11-t.jpg) |
July:
RT-11, a real-time operating system for
monitoring and control, is introduced. |
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![](photos/ddcmp-t.jpg) |
September:
DIGITAL develops DEC Data Communications
Message Protocol (DDCMP) as a standard for its
future computer-to-computer communications. |
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