There are quite a few exit codes used on Linux systems, though no listing you can display when you’re feeling curious. In fact, you won’t see the numeric codes unless you specifically ask for ...

Area codes have been used in place of an operator to dial up a number since around the 1940s, according to the PUC. The new code would serve areas all over Greater Houston, the PUC said in a press ...

There is also another type of postal code, the ZIP + 4 code. According to unitedstateszipcodes.org, the ZIP + 4 was established in 1983 and identifies an even more specific location within a ZIP code.