I don't know how AB works but in the days when I worked I managed a system where a central computer was linked to terminals, allowing information stored on the central computer to be accessed via the terminals. With that system when you typed a letter on the terminal it went straight to the central computer, which acknowledged receipt by sending the letter back to the terminal which, in turn, displayed it on the screen. In other words, you didn't type directly to your own screen, you typed to the central computer and it typed on your screen. If AB works in a similar manner anything you type has to go to AB and back again before it appears on your screen. It would require the person in charge of the software for AB to tell us if that is the way AB works.