 What are the tangler fields?
He was a captain of guards in Estates-General Correctional Institution—better known to its inmates as the Jug—and if he hadn't been able to detect the scent of trouble brewing a cell-block away, he would never have survived to reach his captaincy. And, what was more important, why she couldn't adjust herself to it, now that she was in. From the moment that clans formed, specialization began—the hunters using the weapons made by the flint-chippers, the food cooked in clay pots made by the ceramists, over fire made by the shaman who guarded the sacred flame. From the born mechanic and the man with the gift of gab, society evolved to the point of smaller contact and less communication between the specializations, until now they could understand each other on only the most basic physical necessities—and not even always then. The ultimate should be the complete segregation of each specialization—social and genetic measures to make them breed true, because the unspecialized man is an uncivilized man, or at any rate he does not advance civilization. And letting the specializations mix would produce genetic undesirables: clerk-laborer or Professional-GI misfits, for example, being only half specialized, would be good at no specialization. And the basis of this specialization society was: "The aptitude groups are the true races of mankind." He was civil-service born and bred, and naturally he was proud and content to do a good, clean civil-service job.
 electronic fields near the floor to stop prisoners
 a type of uniform meant to keep the inmates secure  electronic fields in Block O that identify inmates  replacement for guards in Block O  electronic fields near the floor to stop prisoners