Despite the fact that our physical items are unavailable and buildings are shuttered, HOLLIS can and should continue to be a key research resource, wherever students are. That's in part because of the sheer size and enormous variety of what it contains, but also because the online content students can surface there is substantial.
Search HOLLIS as you typically would (we give some advice on constructing effective search strings here). Results can then be limited, via the right-side filters, to materials ONLINE.
The limiter for online materials (like other filters) can be locked for the duration of your HOLLIS search session. When you apply the filter, it will, by default, look like this: When locked, the icon color changes to blue:
Locking filters is a useful option when you want to modify a search, do a completely new search, jump to a subject heading string,etc. You can mix and match locked and unlocked filters, too, as in this example: