I mean, what really is the difference between a PDP-6 and a PDP-10 or DECSYSTEM-20? From the programmers' point of view, not much.

The same goes for PDP-4, -7, -9 and -15.

The same goes for the PDP-5 and -8, and Harris 6120.

For whatever reason, the PDP-11 stayed as -11, despite the huge variation in the product family.

Should the questions about the similar computers be tagged with all the applicable tags, or should the tags be made such that is synonymous with et cetera?

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