 What is a cybrain?
The cool cybrain surgically implanted in him was working on the problem. Two black paragrav-boats whirred along the translucent underside of Newyork's anti-missile force-shield, the Shell. Cybrain had taken charge of his motor nerves. A built-in electronic brain controls his reflexes—" "At ease with that jazz," said Lane, and a sheathed finger snapped out. Lane's mailed hand snapped open a pouch at his belt. The force-bomb "exploded"—swelled or inflated, really, but with the speed of a blast. The cannon trundled into the Square on its olive-drab, box-shaped caterpillar mounting and took up a position equidistant from the bases of the three towers.
 A cybrain is a cybernetic brain. Cybrains are implanted in soldiers to make them the ultimate weapons.
 A cybrain is a cybernetic brain. The cybrain is in control of the Newyork Special Troops, like a hive mind.  A cybrain is a dispatch system that sends the Newyork Special Troops on their assignments.  A cybrain is a cybernetic brain. Cybrains are implanted in soldiers to make them the ultimate weapons.  A cybrain is an AI handler. Each of the Newyork Specail Troops has a cybrain which is their only contact to the command center.