Abbreviationes identifies abbreviations used in medieval Latin manuscripts ("Latin paleography").
The database includes manuscripts held by the Vatican Library and the libraries at Oxford and Paris as well as many smaller collections. Major collections in the United States, such as the manuscripts held by the Morgan Library and the Huntington Library are also included.
The database currently comprises over 70,000 entries containing a total of 80,098 references to manuscripts. Entries in the database cover the 8th century through the 15th century.