Kronski jerked his thumb toward the computer room. "I punched for names of Supremist members coupla minutes ago. Thought maybe we could start in that way." Pell followed, his mind not really on the job yet. He wasn't at his best working with the computers, and yet operating them was ninety per cent of investigation. He supposed he'd get used to it sometime. Three walls of the big computer room were lined with control racks, consisting mostly of keyboard setups. Code symbols and index cards were placed in handy positions. The C.I.B. circuits, of course, were adapted to the specialized work of investigation. In the memory banks of tubes and relays there was a master file of all names--aliases and nicknames included--with which the organization had ever been concerned. Criminals, witnesses, complaints, everyone. Code numbers linked to the names showed where data on their owner could be found. A name picked at random might show that person to have data in the suspect file, the arrest file, the psychological file, the modus operandi file, and so forth. Any of the data in these files could be checked, conversely, against the names. Kronski walked over to where letter sized cards were flipping from a slot into a small bin. He said, "Didn't even have to dial in Central Data for these. Seems we got a lot of Supremist members right in our own little collection." Pell picked up one of the cards and examined it idly. Vertical columns were inscribed along the card, each with a heading, and with further sub-headed columns. Under the column marked _Modus Operandi_, for instance, there were subcolumns titled _Person Attacked_, _Property Attacked_, _How Attacked_, _Means of Attack_, _Object of Attack_, and _Trademark_. Columns of digits, one to nine, were under each item. If the digits 3 and 2 were punched under _Trademark_ the number 32 could be fed into the Operational Data machine and this machine would then give back the information on a printed slip that number 32 stood for the trademark of leaving cigar butts at the scene of the crime. "Got five hundred now," said Kronski. "I'll let a few more run in case we need alternates." "Okay," said Pell. "I'll start this batch through the analyzer." He took the cards across the room to a machine about twenty feet long and dropped them into the feeder at one end. Channels and rollers ran along the top of this machine and under them were a series of vertical slots into which the selected cards could drop. He cleared the previous setting and ran the pointer to _Constants_. He set the qualitative dial to 85%. This meant that on the first run the punch hole combinations in the cards would be scanned and any item common to 85% of the total would be registered in a relay. Upon the second run the machine would select the cards with this constant and drop them into a slot corresponding with that heading. Further scanning, within the slot itself, would pick out the constant number.