An API is a series of functions that programs can use to make the operating system do their dirty work. Using Windows APIs, for example, a program can open windows, files, and message boxes--as well as perform more complicated tasks--by passing a single instruction. Windows has several classes of APIs that deal with telephony, messaging, and other issues.
Guy 2: "Fuh sho, kid's got talent. Hope he gets far."
$bill = $urn->I'llTakeTheBill;