This is because we license our databases, and are licensed to show them only to Auraria users. Thus identification is necessary. The PPP option also gives you free internet access. Northern Light is a free, multi subject index and search engine on the web. Ordinarily, when you request an article through this index, you are charged for it.
Most articles cost several dollars.
The Auraria Library is now subsidizing the cost of full text articles through this database. NetLibrary is a database you can borrow books from electronically. It is a searchable database of both new and old book titles. Auraria Library owns the collection. Registration to use this database is free.