Occasionally, we get to catch a glimpse of the hidden tests that ensure our technology-infused world runs smoothly: color bars on TV or blocks of “lorem ipsum” gibberish text. There’s a fascinating ...

Before streaming and 24/7 programming, there was a time when TV stations actually signed off for the night. Yeah, unbelievable. You'd be watching a late movie or dozing through infomercials, and then, ...