He set up the computer program to sort through the data in chronological order.
After all, it's just another computer program.
The responses are all generated by the computer program.
Enter the maximum bid amount you're willing to pay and the computer program will keep bidding for you up to that amount, or you may bid manually.
Essentially, a screensaver is a tiny computer program that is automatically activated when you leave your computer unattended for a specified period of time.