The Union Catalog can be accessed through a variety of methods:

1. The simplest method is to use a browser Toolbar- to install this toolbar see here.

2. The Union Catalog can be accessed directly at catalog.biblio.ro

3. The Union Catalog can also be accessed by adding search terms in the box above (in the header of the site) and then clicking "Search the Union Catalog"

4. The fourth search method is an application ("gadget" type) that is always handy on the desktop operating system Windows 7 / Vista. For more details see here