Disk generally refers to disk storage (a general category of data storage mechanisms) which may include:
- Magnetic disk
- Floppy disk, a magnetic data storage device using a flexible disc.
- Hard disk drive, a non-volatile magnetic data storage device.
- Optical disc, commonly a polycarbonate disc
- Blu-ray Disc (BD), a high-density optical disc intended mainly for video storage.
- Compact Disc (CD), a form of optical disc used mainly for audio data.
- Digital Versatile Disc (DVD), a form of optical disc used mainly for video and other data.
- Enhanced Versatile Disc (EVD), an optical medium-based digital audio/video format under development.
- High-Definition Digital Versatile Disc (HD DVD), a high-density optical disc intended mainly for video storage.
- Holographic Versatile Disc (HVD), a next generation ultra-high-density optical disc format replacement for blu-ray.
- Laserdisc (LD), the first commercial optical disc storage medium.
- MiniDisc (MD), a magneto-optical disc-based data storage device.
- Disc film, a still-photography film format.
- RAM disk, a volatile solid state drive.
- Solid State Disk (SSD) - A flash-based permanent storage
