||The largest single collection of treaties on the Internet, the UN Treaty Collection contains the full text of approximately 50,000 treaties and related actions as published in the print volumes of the United Nations Treaty Series. Access is fee-based. The treaties are available in English, French and any other authentic language used.
Some multilateral agreements are available without subscription, as is a handy Treaty Reference Guide that defines the different types of agreements (for example, "Modus Vivendi" which is an informal temporary agreement, intended to fill in until a permanent arrangement is put in place).
The UN Treaty office has also produced "a practical guide to the depositary practice" called Treaty Handbook . The Handbook includes a glossary of terms, flowcharts indicating the process treaties go through at the UN, and contact information for the UN Treaty Office.