williams is a quite famous brand of arcade machines that you could usually find in pubs of some countries till the late 80's, very basic games with a smell of beer and tabaco
they also made flippers and slot machines, i think now they only make slot machines
Yep, some of my favorites are Black Knight and High Speed. They also made some great arcade games like robotron, sinistar, defender/stargate, bubbles,and joust.