Dawz

I was wondering if there was a way to connect a computer to a robot. What I want to do is have a program within the robot getting parameters from user input from the computer. I don't want the computer to run multiple programs to control the robot. For example, have a robot ask for direct user input into a function, in which it would be entered from a computer. I noticed there are multiple forms of connection cards, can I use one of them. If so how do I set them up to connect? Thanks