The Logo.
Introverted Engineer looks at His shoes when he's talking to you. Extroverted Engineer looks at Your shoes when he's talking to you.
One says, "Hey, you, get off of my cloud!". The other says "Hey, McCloud, get off of my ewe!".
Windows 6 got scared because Windows 7 8 9
Cheeseburger (joke from my 3 year old neice this evening)
He developed a ten Chin deficit disorder.
X always equals 10
An Aristotalitarian Regime.