Hi Loretta -
For general reference (all subjects): Grolier and a few specific Marshall Cavendish databases
For what I think of as sources of pro/con issues info: SIRS Knowledge Source, Facts on File Issues & Controversies, and CQ Researcher
For global studies: Culturegrams, Gale Global Issues, and Country Reports (Country Reports costs less than $100!)
History: SIRS Decades
We also have Testing & Education Reference Center (I can't say enough good things about this database! Practice tests, online prep books, and more for SAT, PSAT, AP, ACT testing as well as career exploration resources, scholarship search, resume builder and more...)
I've been cutting down on databases and replacing many of them with e-reference books. Several of the reference publishers (like Salem) offer a deal where you buy the reference set in print format and get the e-version free. So I've been building up my history, English, science, and math digital offerings that way and it's saving quite a bit of money.
- Janice