you can also get optical discs in different shapes
Notice that they are (mostly) symmetric (the parthenon thingy is stretching it a bit) and the cutout parts are fairly large...
Penn State's mascot is the Nittany Lion, a breed of mountain lion native to the area (Mount Nitanny is visible from the stadium). One of the logos they use is the lion's pawprint, which has 5 toes (the only remaining specimen, which died in 1903 and was stuffed had 6 toes on the front paws, not an unusual mutation in cats, leaving a 5-toed footprint)
Imagine if you will, back in the late 90's, when the admissions department put admissions info (a video tour, application forms, etc) on CD-ROMs and had them shaped like the lion's paw. It was a good bit rounder than the above image, but the small notches cut out between the toes left it a bit asymmetric, and because they were small, the eddy currents cause it to howl like a siren when the disc spun up...
Our branch campus alone got 3000 of the discs. System wide? Probably 100,000 or more. Every one of them completely useless, unless the users and their neighbors were all stone deaf.
Learning had occurred!
Of course, they could have just
asked someone...
