
Its defenses had been more than adequately provided for—which was understandable, since it
was the capi-tal and the legislators appropriated freely.
It seemed unreasonable to him that Central was still working. Why hadn't some group of
engineers made their way into the main power vaults to kill the circuits temporarily? Then he
remembered that the vaults were self-defending and that there were probably very few technicians
left who knew how to handle the job. Technicians had a way of inhabiting industrial regions, and
wars had a wav of destrovine those regions. Dirt farmersusually had the best survival value.
Mitch had been working with aircraft computers before he became displaced, but a city's
Central Service Coordinator was a far cry from a robot pilot. Centrals weren't built all at once;
they grew over a period of years. At first, small units were set up in power plants and waterworks
to regulate voltages and flows and circuit conditions automatically. Small units replaced
switchboards in telephone exchanges. Small computers measured traffic flow and regulated lights
and speed limits accordingly. Small computers handled bookkeeping where large amounts of
money were exchanged. A computer checked books in and out at the library, also assessing the
fines. Com-puters operated the city buses and eventually drove most of the routine traffic.
That was the way the city's Central Service grew. As more computers were assigned to various
tasks, engineers were hired to coordinate them, to link them with special circuits and to set up
central "data tanks," so that a traffic regulator in the north end would be aware of traffic
conditions in the main thorough-fares to the south. Then, when the micro-learner relay was
invented, the engineers built a central unit to be used in conjunction with the central data tanks.
With the learning units in operation, Central was able to perform most of the city's routine tasks
without attention from human supervisors.
The system had worked well. Apparently it was still working well three years after the
inhabitants had fled before the chatter of the Geiger counters. In one sense Ferris had been right:
A city whose machines carried on as if nothing had happened—that city might be a dangerous
place for a lone wanderer.
But dynamite certainly wasn't the answer, Mitch thought. Most of man's machinery was already
wrecked or lying idle. Humanity had waited a hundred thousand years before deciding to build a
technological civilization. If it wrecked this one completely, it might never build another.
Some men thought that a return to the soil was desirable. Some men tried to pin their guilt on
the machines, to lay their own stupidity on the head of a mechanical scapegoat and absolve
themselves with dynamite. But Mitch Laskell was a man who liked the feel of a wrench and a
soldering iron—liked it better than the feel of even the most well-balanced stone ax or wooden
plow. And he liked the purr of a pint-sized nuclear
engine much better than the braying of a harnessed jackass.
He was willing to kill Frank Ferris or any other man who sought to wreck what little remained.
But gloom settled over him as he thought, "If everybody decides to tear it down, what can I do to
stop it?" For that matter, would he then be right in trying to stop it?
At sundown he came to the limits of the city, and he stopped just short of the outskirts. Three
blocks away a robot cop rolled about in the center of the intersection, rolled on tricycle wheels
while he directed the thin trickle of traffic with candy-striped arms and with "eyes" that changed
color like a stoplight. His body was like an oil drum, painted fire-engine red. The head, however,
had been cast in a human mold, with a remarkably Irish face and a perpetual predatory smile. A
short radar antenna grew from the center of his head, and the radar was his link with Central.
Mitch sat watching him with a nostalgic smile, even though he knew such cops might give him
considerable trouble once he entered the city. The "skaters" were incapable of winking at petty