It would have been 5 if it had the other scenes. Al goes crazy when the computer starts talking to him and mocks him. I distinctly remember it saying, "the average family has no real use for me".
innuendoes involving "RAM" or how big one's "hardware" is are always charming, especially in late 80s/early 90s sitcoms. However, 7MB of RAM and 3600 baud modem? I don't think either existed. GOD!