The code doesn't change your original acronym document - it creates a new one with a copy of the acronym table, then proceeds to update that.

The macro leaves all documents open, because:
(a) I didn't assume you'd want to close the document containing the macro (e.g. you might want to run it on another document);
(b) I assumed you'd want to review/edit the output document; and
(c) the source document may already have been open, in which case you would probably want it to remain that way. Extra code could have been added to close the source document had it already been closed but leaving it open allows you to review the content in light of the macro's processing.

You shouldn't need to use the Task Manager to access any of these documents once processing has concluded.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]