As has been mentioned repeatedly in these threads, there is no option for merging computers or removing inactive ones. As per your instructions, I began going to the individual websites. I went to five of them; each one either had no merge function, or would only merge computers with the same name. There was no way to simply delete old, inactive systems.

This is too much effort. I'll simply leave the old computer names on the various lists - but it's absolutely absurd that all of you computer people can't develop a universally agreed-upon interface that includes these basic functions.