Centering within a field in MicroSoft Access?

In 1961, a group of students at MIT, including Steve Russell, programmed a game called Spacewar! on the then-new DEC PDP-1. The game pitted two human players against each other, each controlling a space ship capable of firing missiles. A black hole in the center created a large gravitational field and another source of hazard. This game was soon distributed with new DEC computers and traded throughout primitive cyberspace. Presented at the MIT Science Open House in 1962, it was the first widely available and influential game.