Sorry - this is a very noob query, but I know zip about the Global Positioning System.
First, is there a subscription fee attached to GPS hardware? I assume someone has to pay the bird's upkeep? Or do you just pay a one-off for the gadget and that's it?
Second, I notice you can buy some simple hardware to make your laptop 'locatable'. Does this then make your laptop into a big GPS screen? I guess there must be some software that you also need for this......
Thanks :-)



