Related:

• How many IBM PC owners -- does it take to screw in a light bulb?
  Two. One to do it, but one to check the new bulb for viruses first....
• How many Mac owners -- does it take to screw in a light bulb?
  Just one, but the new light bulbs aren't compatible with the old sockets, so he has to buy a complete upgrade or a new light....
• How many doctors -- does it take to screw in a light bulb?
  Only one, but he has to have a nurse to tell him which end to screw in....
• How many Canadians -- does it take to screw in a light bulb?
  Only one, but he has to see an American do it first....
• How many men -- does it take to screw in a light bulb?
  Only one, but you have to nag him for a fortnight first....
• How many editors -- does it take to screw in a light bulb?
  Only one, but first they have to rewire the entire building....
• How many US Presidents -- does it take to screw in a light bulb?
  Only one. If he can handle 250000000 people a day I think he can handle screwing one extra light bulb....
• How many keyboardists -- does it take to screw in a light bulb?
  Only one, but if you wait until next month, Yamaha will have a new model bulb out which is much better....
• How many Mac owners -- does it take to screw in a light bulb?
  Two: One to ask the socket to eject the old bulb, and one to insert the new one....