In the systems page, it would be great to be able to have (in addition to "contains", "is," and "is not") a "does not contain" search operation, as well
*** Bug 616834 has been marked as a duplicate of this bug. ***
You can currently do this with 'is not' *<search_term>*
*** Bug 1069777 has been marked as a duplicate of this bug. ***
I'd like to close this bug. We are currently in the process of transitioning to a new search UI (e.g. Activity -> System) which will eventually be replacing all "old-style" search bars. The new search bars incorporate this request by providing a "omits substring" option.