Salem Online provides digital access to reference materials, covering literature, history, and health. It also includes city, business, and country information.

Magill’s Literary Annual from 1977 to the current year, reviewing significant fiction and nonfiction titles published each year.
A selection of Salem's Critical Insights books for literary criticism research
A selection of resources covering American history and current events
Consumer health encyclopedias
Science encyclopedias, including
- Principles of Anatomy
- Principles of Botany
- Principles of Energy
- Principles of Information Technology
- Principles of Marine Science
Searchable Directories provided by Greyhouse:
- Dementia Handbook & Resource Guide
- Complete Mental Health Resource Guide 2020/21
- Older Americans Information Directory 2020/21
- Complete Learning Disabilities Resource Guide, 2021
- Business Information Resources, 2021