If Operating System were AIRLINES....
 
DOS Air: Passagers walk out onto the runway, grab hold of the plane, push 
it until it gets in to the air, hop in, then jump off when it hits the 
ground.     They grab the plane again, push it back into the air, hop on, 
jump off...
 
MAC Airways:  The cashiers, flight attendents, and pilots all look the 
same, talk the same, and act the same.  When you ask them questions 
about the flight, they reply that you don't want to know, don't need to 
know and would you please return to your seat and watch the movie.
 
Windows Airlines:  The terminal is neat and clean, the attendants 
courteous, the pilot capable.  The fleet of Lear jets is emmence.  Your 
jet takes off without a hitch, pushes above the clouds, and, at 20,000 
feet, it explodes without a warning.
 
OS/2 Skyways:  The terminal is almost empty--only a few prospective 
passengers mill about.  The announcer says that a flight has just 
departed, although no planes appear to be on the runway.  Airline 
personel apologize profusely to the customers in a hush voices, pointing 
from the time to time at the sleek powerful jets outside.  They tell each 
passsanger how great the the flight will be on these new jets and how 
much safer it will be than Windows Airlines, but they will have to wait a 
little longer for the technicians to finish the flight systems.  Maybe 
until mid-1995.  Maybe longer.
 
Fly Windows NT:  Passengers carry their seats out into the the tarmac and 
place them in the out line of a plane.  They sit down, flap their arms, 
and make jet swooshing sounds as if they were flying.
 
Unix Express:  Passingers bring a piece of the airplane and a box of 
tools with them to the airport.  They gather on the tarmac, argue about 
what kind of plane they want to build.  The passangers split into groups 
and build several different aircraft but give all of them the same name.  
Only some of the passagers reach their destinations, but all of them 
beileive they have arrived.