It's possible that the "newest" ones use photo sensors as they now also double as standard desktop scanners, but I'm not sure they would be marketed as OMR. I s

It's possible that the "newest" ones use photo sensors as they now also double as standard desktop scanners, but I'm not sure they would be marketed as OMR. I suspect Scantron and Pearson NCS won't be around much longer as standard scanners are much cheaper, can accomplish the same goals (minus printing results on the form, without a special attachment on expensive scanners), and embedded processing continues to grow.