Deciphering the codes of everyday life: car tyre codes, telegraph abbreviations, the hazardous substance Fire Diamond, and North American train whistle codes.
The Fire Diamond ranks the danger of various hazardous substances to fire fighters. But does any substance rank the highest in all its categories?
The markings on a standard car tyre encode an enormous amount of information.
The Phillips Code provided a standard set of abbreviations to save money and time sending telegrams. “POTUS” is still used today (although rarely for telegrams).
When a train blasts one long and three short whistles, it’s time to attach a torpedo to the tracks.