UNIX Magic Poster
The oregano is reputedly referring to an incident in which one of the original folks involved with BSD was hassled for coming across the Canadian/U.S. border with a bag of what was assumed to be an illegal substance, and turned out to be oregano.
The UNIX posters were illustrated by Gary Overacre showing the various commands and concepts related to UNIX commands. It was designed to capture the essence of the UNIX operating system showing UNIX as the Wizard who is preparing command potions using the magic of different UNIX tools. The posters gained popularity for their whimsical and informative depiction of UNIX commands and has since become a beloved symbol within our UNIX and open-source communities.