When a library subscribes to a database, such as JSTOR, the publisher of the database needs to ensure that only authorised users (usually staff and students of the subscribing institution) are able to use the database. On-campus, this is often ensured by registering the IP numbers of the institution's computers with the database supplier. When you login to a database on campus it is likely that you will never know that you are using IP secured access to a database.

However, students and staff often want to access these databases off-campus (eg at home) so other methods of ensuring that you are an authorised user need to be adopted. 

Other usernames and passwords

Not all electronic resources suppliers choose to use the Athens system. Therefore, your library will usually provide you details of which username and password you need to access each particular resource. Unfortunately, due to publisher restrictions, some of the databases will not be available off-campus.

Access via the library catalogue

Increasingly, suppliers of library management systems or the library catalogue are developing technologies to allow libraries to provide off-campus access to their electronic resources via the library catalogue. This often involves using your Union user name and password.