Related:

• How many Unix system vendors -- does it take to change a light bulb?
  None. All of the light bulbs you have are 'standard variants' and as such won't fit your particular implementation of the socket....
• How many divorcees -- does it take to change a light bulb ?
  None. The sockets all went with the house....
• How many women with PMS -- does it take to screw in a light bulb?
  None. You can do it yourself, dammit....
• How many real women -- does it take to change a light bulb?
  None: A real woman would have plenty of real men around to do it, and one of them can change the bulb while he's at it....
• How many boarding school students -- does it take to screw in a light bulb?
  None, they have their parents do it for them....
• How many hardware engineers -- does it take to change a light bulb?
  None. "We'll fix it in software....
• How many software engineers -- does it take to change a light bulb?
  None. It's a hardware problem....
• How many software engineers -- does it take to change a light bulb?
  None. "We'll document it in the manual....
• How many undertakers -- does it take to change a light bulb?
  None. They just paint them black and go on using them....