(DEBra IAN) A Linux-based operating system developed by Ian Murdock in 1993 and named after his future wife and himself. Running on most major platforms, including x86, Itanium, PowerPC, SPARC, PA-RISC, MIPS and IBM mainframes, it is noted for the more than 18,000 applications that accompany the distribution. Version 4 of Debian was released in April 2007. Debian was the inspiration for several derivatives (see Ubuntu, Knoppix and Linspire). For more information, visit www.debian.org.