Online Databases: With many print and CD-ROM databases migrating to the Internet, access to online databases shall be a priority. Online databases, unlike print resources and CD-ROMs, can be updated on a daily basis. Purchase of access to databases covering subject areas that require constant updating will be considered. Deciding factors when acquiring access to online databases are update frequency, cost, ease of use and reliability.

Among the most important resource for finding online databases is Library Journal.

Audio-Visual Collections

The Mercer County Library System offers a wide range of audiovisual resources and materials. Videos, compact discs, audiocassettes, DVDs and Books on Tape/ CD are selected by the professional staff in a systematic manner, using review media, critical works and patron requests as selection guides.

The media collections shall be weeded routinely, with materials in poor physical condition withdrawn at any time.

Video and DVD collections: Videos and DVDs for both adults and Children are selected to meet educational, cultural and entertainment needs of our communities. Selection criteria include:

  • Favorable reviews in reliable journals and sources.
  • Director’s/Producer's reputation. Material’s subject timeliness.
  • Material’s relation to existing collection, e.g., the need for new coverage on a subject or opposing viewpoint.
  • Public demand as expressed in requests for the title, if the title fits within any of the above criteria.

Because resources for purchasing audiovisual materials are limited, the Mercer County Library System does not purchase the latest popular entertainment videos or DVDs in a comprehensive fashion. The Mercer County Library System will therefore purchase a representative collection of popular entertainment videos and DVDs that meet the above criteria, garner critically-acclaimed reviews, and which fall within the collection needs as determined by the library audiovisual selectors. The Mercer County Library System will not purchase more than one copy of a DVD or video title per branch.

Audio Recordings: Audio recordings are collected in compact disc and/or audiocassettes format at all Branches. Criteria for selection include public demand, importance of the work or performance, recording quality and relation to other materials in the system.

Books on Audio Cassette/CD: The Mercer County Library System has a collection of books recorded on tape and CD. Criteria for selection include patron demand and favorable review.