'the split second'

Train schedules are a matter of pride and of apprehension to nearly everyone. When, far up the track, the block signal snapped from red to green and the long, stabbing probe of the headlight sheered the bend and blared on the station, men looked at their watches and said, "On time."

There was pride in it, and relief too. The split second has been growing more and more important to us. And as human activities become more and more intermeshed and integrated, the split tenth of a second will emerge, and then a new name must be made for the split hundredth, until one day, although I don't believe it, we'll say, "Oh, the hell with it. What's wrong with an hour?" But it isn't silly, this preoccupation with small time units. One thing late or early can disrupt everything around it, and the disturbance runs outwards in bands like the waves from a dropped stone in a quiet pool.

—John Steinbeck, East of Eden (1952)