Greatest Inventions Ever

I was marveling at my ipod over the weekend. Seriously, why did it take so long for this incredibly ingenious idea??

Anyhoo, it got me thinking as to what the greatest inventions ever were, here is my list (btw, I'm taking 30 seconds to come up with this... so I'm sure I"ll forget a lot)

• ipod
  
• internet
  
• computer
  
• toilets (although, isn't anyone going to update the toilet, its been the same for a long time)
  
• airplane (I still marvel)
  
• remote control
  
• microwave
  
• digital frames (again, why so long??)
  
• cell phones (gosh these exploded since college)
  
• tivo (thank god)
  
• caller id
  
• refrigeration
  
• electric baby swings
  
• batteries (for when power goes out and electric baby swings are needed)
  
• the wheel
  
• AIR CONDITIONING (geeezus! how could I forget--added 6/30/2008--its been hot as hell here in DC)
  

Ok, add yours to the comments. I may come back and add more when I have time.