A screen may refer to any of the following:
1. A term used to describe the viewing portion of a display. For example, the portion of the monitor or flat-panel you are likely using to view this web page is considered the screen. The black edge around the screen is called the bezel. The picture shows an example of a flat-panel screen.
2. A Linux command; see the screen command page for further information on this command.
When scrolling, it may be described as "one screen at a time," which indicates one full-screen height scrolls instead of one or a few lines at a time. For example, the PgUp often scrolls up one screen at a time, and PgDn scrolls down one screen at a time.