Berkeley Software Distribution (BSD) is a Unix operating system derivative developed and distributed by the Computer Systems Research Group (CSRG) of the University of California, Berkeley, from 1977 to 1995. There are several free and open source variants including FreeBSD, OpenBSD and NetBSD.
This design is for Unix hackers, system administrators and users of one of the BSD variants out there. It shows the words "RUN" and "BSD" in a white font between two red bars. Great for work, parties, conferences and other events where unix geeks and nerds meet.