Hi Sarah,
The programming software for say a Kenwood THF6A will let you control
various functions of the rig such as programming in memories etc.
Unless your computer has a serial port you'll probably need to buy a usb to
serial converter.
Some of them work well others don't work so well.
If you want to find out more about that rig and its accessories go to:
www.rffun.com
That's the other alternative Universal Radio web site.
Once there go to the link for handy talkies.
These are listed there by brand.
Hope this helps.
73's,
Eric
KU3I