DOS disk operating system

GPS global positioning system

HTML hypertext markup language

ILS integrated library system

IT information technology

MARC machine readable cataloging

MP3 MPEG Audio Layer III

OPAC online public access catalog

PDF Portable Document Format

PR public relations

RSS RDF Site Summary or Really Simple Syndication

VoIP Voice over Internet Protocol

WYSIWYG what you see is what you get

XML Extensible Markup Language