UNIX Airways
Everyone brings one piece of the plane along when they come to the 
airport. They all go out on the runway and put the plane together 
piece by piece, arguing non-stop about what kind of plane they are 
supposed to be building.

Air DOS
Everybody pushes the airplane until it glides; then they jump on and let
the plane coast until it hits the ground again. They then push again, 
jump on again, and so on...

Mac Airlines
All the stewards, captains, baggage handlers, and ticket agents look
and act exactly the same. Every time you ask questions about details, 
you are gently but firmly told that you don't need to know, don't want 
to know, and everything will be done for you without your ever having 
to know, so just shut up.

Windows Air
The airport terminal is pretty and colourful, with friendly stewards, 
easy baggage check and boarding, and a smooth take-off. After about 10 
minutes in the air the plane explodes with no warning whatsoever.