Well, the radio I have, Midland WR-100 has two ports, one labeled 'remote alert' , the other 'pc'.
I believe the remote alert port is for a remote speaker or whatever.
I am not sure about the pc port, I was HOPING it might be some sort of data feed, like the text that displays on the LCD, which I would be able to feed into a PC and then do something with it...
I know my dad had some kind of x10 temperature monitoring stuff hooked up to his computer at one point - I thought that was what it might have meant, but maybe not.