Hyper Terminal by Hilgraeve (http://hilgraeve.com/)
Hyper Terminal Private
Edition originally in the Microsoft Windows operating Software. The
new Vista Operating System does not contain Hyper Terminal so a copy
can be obtained at the link provided.
FCC Frequency
Data (http://www.perconcorp.com/)
PerCon is the leading provider of FCC licensing data to local and
federal agencies, retailers, manufacturers, and radio enthusiasts.
Data is provided on CD ROM and on the Internet.
Resource
Material/Books (http://www.firebooks.com/)
Firefighters Bookstore provides books, videos, software for Firefighters
and EMT's. Technical & reference books including IFSTA, DAVIS, NFPA,
BRADY & MOSBY.
SafetySource.com (http://www.safetysource.com/)

SafetySource.com is an excellent source for obtaining relevant data to support sales programs for contacting various public safety agencies throughout the United States. Their data covers most every public safety based agency in the country. They can organize the information into regions, by city, or county etc.
ISIO (http://www.intsi.org/)
International Security Industry Organization - is an international organization dedicated to improving efficient communication to all stakeholders in the security industries, and providing them with the necessary information to be more effective in their daily tasks.