SDL stands for "Simple DirectMedia Layer".
Simple DirectMedia Layer is a cross-platform multimedia
library designed to provide fast access to the graphics
framebuffer and audio device. It is used by MPEG playback
software, emulators, and many popular games, including the
award winning Linux port of "Civilization: Call To Power."
Simple DirectMedia Layer supports Linux, Win32, BeOS,
MacOS, Solaris, IRIX, and FreeBSD.