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Learn about the technology and hierarchy of computer components and recording media that are used to retain digital data. Find out the difference between primary, secondary, tertiary, and off-line storage, and how they are accessed by the CPU.
Data storage is the recording of information in a storage medium, such as handwriting, phonographic recording, magnetic tape, or optical discs. Learn about the types, history, and trends of data storage, and see examples of different media and formats.
Paper data storage refers to the use of paper as a data storage device. This includes writing, illustrating, and the use of data that can be interpreted by a machine or is the result of the functioning of a machine. A defining feature of paper data storage is the ability of humans to produce it with only simple tools and interpret it visually.
Learn about the potential technology of holographic data storage, which records information throughout the volume of a photosensitive medium and can store and read millions of bits in parallel. Find out how holographic storage works, its advantages, limitations, and current applications.
Disk storage is a data storage mechanism based on a rotating disk, such as hard disk drives, floppy disks, or optical discs. Learn about the history, technology, and interfaces of disk storage devices and their applications in computer and consumer electronics.
Learn about the types, characteristics and applications of non-volatile memory, a computer memory that can retain data without power. Compare electrically and mechanically addressed systems, such as flash, ROM, EPROM, F-RAM, MRAM, PCM and FeFET.
Removable media are data storage devices that can be inserted and removed from a computer system. Learn about the types, uses, and risks of removable media, from punched cards to USB flash drives, and their evolution over time.
A business card is a card bearing business information about a company or individual. Learn about the origin, construction, printing and design of business cards, as well as their cultural and professional significance.