One of the best ways libraries can enhance their catalogs are with tagging in the OPAC. The population we target understands tags. They used applications like Tumblr, Flickr, Pinterest, Facebook, and many others.
Allowing the tags to be user-generated will bring a new light to what the students think of outside of the typical LCSH. Their tags will help us understand how to market our resources.
A disadvantage to employing user tagging is you may get tags that are not related to the title. It is always a risk letting other in to do a work you know so well but it is important that we tailor our marketing to our audience and OPAC tags are the perfect way. Not only with marketing but with the services we offer.
LibraryThing is a tagging system that OPACs that accepts HTML you can add the tagging from Library Thing.
I encourage everyone to get a LibraryThing account, you can get a personal account and add 200 books for free. If you are like me and have over 200 books you can buy a lifetime account for $20.