One regular subject for nibbles in the Snacking Otaku is the various formats that have been created to record sound, video and computer data. Here is a dedicated list all formats that the Snacking Otaku has covered so far (and some that are planned in the future).
Of course, if your impatient, you can always visit the Museum of Obsolete Media for your format information fix.
Akai VK
Barcodes
Blu-ray
CVC
Digital Compact Cassette (DCC)
DV
DVD
Floppy Disk
Grundig EN7 / DeJUR Mini-Memo
Hard Disk Drive
HD-DVD
LaserDisc
Microcassette
MicroMV
Mini-Cassette
MiniDisc
NT
3M Revere Stereo Tape Cartridge
Philips LFH0006 mini-cassette
Picocassette
Punched Card/Tape
Sony Ruvi
Steno-Cassette
Television Electronic Disc (TeD)
VHD
VHS-C
Video Cassette Recording (VCR)
Video8