404. That’s an error.

The requested URL /_/+1/confirm?hl=en&url=http%3A%2F%2Fblog.csta.acm.org%2F2014%2F08%2F25%2Fthe-worlds-oldest-computer-and-the-antikythera-challenge%2F&title=The+world%E2%80%99s+oldest+computer+and+the+Antikythera+challenge was not found on this server. That’s all we know.