Looks like these can be divided into [tag:tcpip-ports], [tag:bsd-ports], and maybe [tag:physical-ports], though that doesn't seem like a terribly useful tag to me (example question is https://superuser.com/questions/435213/what-does-com-stand-for-in-terms-of-serial-ports).

Any objections or improvements?  If not, I can go through and retag for the tcpip/bsd distinction, and remove the physical ports.