- Single-user License: Only one person can use this title at a time.
- Multi-user License: Simultaneous access is provided so more than one person at a single site can use this title at the same time.
- Class Set: 1 Student Copy License: Only one student can use a copy of this title for the license term, and the copy will be used up once the term ends.
- Subscription Access: This digital resource is available for a limited period. At the end of the subscription period, you must renew your subscription to continue access. Subscription periods are noted for applicable titles and may be based on timeframe (such as one year) or number of checkouts (such as 26 checkouts).
- Perpetual Access: You only need to purchase this digital resource once and will have perpetual access.
- Worldwide Rights: Worldwide Rights (WWR) indicates the title is eligible for distribution outside of the United States in all foreign countries.
Please see below for a definition of other formats.