A tourist walked into a pet shop and was looking at the animals on
display.
While he was there another customer walked in and said to the
shopkeeper, "I'll have a C monkey please."
The shopkeeper nodded, went over to a cage at the side of the shop, and
took out a monkey.  He fit a collar and leash and handed it to the
customer, saying, "That will be $5,000".  The customer paid and walked
out with his monkey.
Startled, the tourist went over to the shopkeeper and said, "That was a
very expensive monkey. Why did it cost so much?!"

    The shopkeeper answered, "Ah, that monkey can program in C - very
fast, tight code, no bugs, well worth it!"

    The tourist looked at the monkey in another cage.  "That one's even
more expensive- $10,000!  What does it do?"
 

       "Oh, that one's a C++ monkey; it can manage object-oriented
programming, Visual C++, even some Java.  All the really useful stuff",
said the shopkeeper.
 

        The tourist looked around for a little longer and saw a third
monkey in a cage of its own.  The price tag around its neck read
$50,000.
He gasped to the shopkeeper,  "That one costs more than all the others
put together! What on earth does it do?"
The shopkeeper replied, "Well, I haven't actually seen it do anything,
but it says it's a consultant."