12-Point Courier is a font style that is the standard among screenplays and teleplays within the film and television industry.

One reason for this particular style of font is to mirror the font of the old manual typewriters that were used in the studio system prior to computer printers. If it ain't broke, why fix it. Another reason for this style is that  each letter or symbol of the Courier is exactly the same width. This can be of great importance when gauging the "one page per one minute" measurement that is standard among scripts whereby one page of a screenplay roughly equates to one minute of screen time.

The typeface itself was created in 1955 by Howard "Bud" Kettler with the original name of the font referred to as the "messenger" font. But, after some thought, he felt the font itself deserved a bit more distinction, so he renamed it the "courier" font.

Other fonts deemed acceptable within the realm of film and television are Courier New and Final Draft Courier, fonts with little or no difference from the parent Courier.