Man goes in to a pet shop and there are four cadges with monkey's in them.
He strolls over to the first cadge and looks at the price tag £10,000
"why so expensive? " he asks
"they can build a full p.c system"
"wow"he says. so he moves along to the next cadge and reads the price
"JESUS £20,000 what do these ones do?" he asks
"network techies, build any size of network"
"cool" the next cadge he comes to says £30,000
"GOD DAM, what do these do?"
"ah, they are software writers. Any kind of software you want they can do"
so the man hurries to the last cadge to see what huge price is in them but is disapointed when it only says £10
"what do these do?" he says in a disapointed tone
"ugghh they are just project managers"