What is "randomizers"

Usage examples of "randomizers".

Men also used computers to drive their ships, but had now gained an edge over the best randomizers by relying once more on their own brains, parts of which were evidently freed of hurry and dwelt outside of time, where even speeding light must be as motionless as carved ice.

Men also used computers to drive their ships, but had now gained an edge over the best randomizers by rely­ing once more on their own brains, parts of which were evidently freed of hurry and dwelt outside of time, where even speeding light must be as mo­tionless as carved ice.

I knew that the casino ads were shimmying and singing like sirens, luring passersby onto the rocks of the roulette wheels and randomizers, sucking them in with erotic promises of riches, but all that reached me through the window was a tangle of colored light and a distant hum, punctuated every so often by the buzz and blink of a macroscopic floater passing nearby.