Pardon my ignorance, but what is a trunking system?

At 02:18 PM 8/16/02 -0400, you wrote:
>Hi John.  You may want to join the blindscanner list on yahoogroups.com.
>To join sed a blank E-mail to [log in to unmask]  I
>don'tknow much about that scanner, but you can program it from the radio.
>What kinds of trunked systems are you wanting to monitor?  If you want
>specific talk group information on a certain system go to weither
>www.trunkedradio.net, or www.trunktracker.com
>
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>On Fri, 16 Aug 2002, John Farina wrote:
>
> > Hi all,
> >
> > This has probably been discussed many times before but I would like to know
> > if anyone has information concerning public service scanners which are user
> > friendly for the blind.  This would include the computer software to
> program
> > them.  Specifically I need to program some trunking features such as talk
> > groups in to my scanner.  Currently I have a radioshack pro 94 but it
> is not
> > computer programmable.
> >
> > thanks for any help.
> >
> > John w2qcy
> >