What are disks?

Some articles on disks, disk:

Selenium Rectifier - Construction
... The metal squares, or disks, also serve as heat sinks in addition to providing a mounting place for the selenium disks ... Stacks of thousands of miniature selenium disks have been used as high voltage rectifiers in television sets and photocopy machines ...
Igromania - Disks
... The second disk contains game demos, mods, online games installers (time limited or completely free versions), patches, useful software, flash games, cheat codes, saves, trainers, wallpapers ...
Transiting Extrasolar Planets - Detection of Extrasolar Asteroids and Debris Disks - Circumstellar Disks
... Disks of space dust (debris disks) surround many stars ... The Hubble Space Telescope is capable of observing dust disks with its NICMOS (Near Infrared Camera and Multi-Object Spectrometer) instrument ... Dust disks have now been found around more than 15% of nearby sunlike stars ...
Software Preservation Society
... Society (CAPS), is a group of computer enthusiasts that is concentrating on finding old software disks (mostly games) and taking a snapshot of the disks ... system that runs on small ARM-based devices that connects to a floppy disk drive and a host PC over USB ... KryoFlux reads "flux transitions" from floppy disks at a very fine resolution ...
Sector Slipping
... Sector slipping is a technique used to deal with defective sectors in hard disk drives ... Due to the volatility of hard disks from their moving parts and low tolerances some sectors become defective ... Defective sectors can even come on hard disks from the factory so most disks incorporate a bad-block recovery system to cope with these issues ...