SIRIUS CYBERNETICS CORPORATION
Elevators: Modern elevators are strange and complex entities. The ancient electric winch and "maximum-capacity-eight-persons" jobs bear as much relation to a Sirius Cybernetics Corporation Happy Vertical People Transporter as a packet of mixed nuts does to the entire west wing of the Sirian State Mental Hospital.
This is because they operate on the curious principle of "defocused temporal perception." In other words they have the capacity to see dimly into the immediate future, which enables the elevator to be on the right floor to pick you up even before you knew you wanted it, thus eliminating all the tedious chatting, relaxing and making friends that people were previously forced to do while waiting for elevators.
Not unnaturally, many elevators imbued with intelligence and precognition became terribly frustrated with the mindless business of going up and down, up and down, experimented briefly with the notion of going sideways, as a sort of existential protest demanded participation in the decision-making process and finally took to squatting in basements sulking.
An impoverished hitchhiker visiting any planets in the Sirius star system these days can pick up easy money working as a counselor for neurotic elevators.
"Yeah," said Zaphod, stepping into it, "what else do you do besides talk?"
"I go up," said the elevator, "or down."
"Good," said Zaphod, "We're going up."
"Or down," the elevator reminded him.
"Yeah, OK, up please."
There was a moment of silence.
"Down's very nice," suggested the elevator hopefully.
"Good," said Zaphod, "Now will you take us up?"
"May I ask you," inquired the elevator in its sweetest, most reasonable voice, "if you've considered all the possibilities that down might offer you?"