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Punch card
Punch cards also known as Hollerith cards are paper cards containing several punched holes that where originally punched by hand and later by computers that represents data. These cards allowed to store information and be able to access that information by entering the card through the computer
Punched cards were first used around 1725 by Basile Bouchon and Jean-Baptiste Falcon as a more robust form of the perforated paper rolls then in use for controlling textile looms in France. -
Magnetic Tape
Magnetic tape is a long and narrow strip of plastic that thin magnetic material is coated on. Nearly all recording tape is of this type, whether used for recording audio or video or computer data storage.
Magnetic tape was first invented for recording sound by Fritz Pfleumer in 1928 in Germany. Pfleumer's invention used an iron oxide(Fe2O3) powder coating on a long strip of paper.
Magnetic tape has been used for data storage for over 50 years -
Magnetic Drum
Drum memory is an obsolete magnetic data storage device. It was invented by Gustav Tauschek in 1932 in Austria and was widely used in the 1950s and into the 1960s as computer memory. -
Selectron Tube
The Selectron tobe was an early form of digital computer memory developed by Jan A. Rajchman and his group at the Radio Corporation of America under the direction of Vladimir Zworykin, of television technology fame
Development of Selectron started in 1946 at the behest of John von Neumann of the Institute for Advanced Study -
Magnetic Core
Magnetic-core memory was the predominant form of random-access computer memory for 20 years (circa 1955–75). It uses tiny magnetic toroids (rings), the cores, through which wires are threaded to write and read information.
Substantial work in the field was carried out by the Shanghai-born American physicists An Wang and Way-Dong Woo, who created the pulse transfer controlling device in 1949 -
Hard disk
A hard disk drive (HDD) is a data storage device used for storing and retrieving digital information using rapidly rotating disks (platters) coated with magnetic material. An HDD retains its data even when powered off
HDDs were introduced in 1956 as data storage for an IBM real-time transaction processing computer[2] and were developed for use with general purpose mainframe and minicomputers -
8" Floppy
IBM started its development of an inexpensive system geared towards loading microcode into the System/370 mainframes. As a result, the 8-inch floppy emerged. An 8-inch disk could store about a megabyte; many microcomputer applications didn't need that much capacity on one disk, so a smaller size disk with lower-cost media and drives was feasible. -
5.25" Floppy
Allan Shugart developed a the 5.25-inch floppy disk in 1976. Shugart developed a smaller floppy disk, because the 8-inch floppy was too large for standard desktop computers. The 5.25-inch floppy disk had a storage capacity of 110 kilobytes. The 5.25-inch floppy disks were a cheaper and faster alternative to its predecessor. -
Optical disc
James T. Russel invented the optical digital television recording and playback television in 1970; however, nobody took to his invention. In 1975, Philips representatives visited Russel at his lab. They paid Russel millions for him to develop the compact disc (CD). In 1980, Russel completed the project and presented it to Sony. A standard Blu-ray disc can hold about 25 GB of data, a DVD about 4.7 GB, and a CD about 700 MB. -
Flash memory
Flash memory was invented by Dr. Fujio Masuoka while working for Toshiba circa 1980. Masuoka and colleagues presented the invention at the IEEE 1984 International Electron Devices Meeting (IEDM) held in San Francisco. Limitations: Block erasure, read disturb, memory wear. Some applications: Serial flash, firmware storage, flash memory as a replacement for hard drives, flash memory as RAM -
3.5" Floppy
The 3.5-inch floppy disk had significant advantages over its predecessors. It had a rigid metal cover that made it harder to damage the magnetic film inside. -
Zip
The Zip drive is a medium-capacity removable disk storage system that was introduced by Iomega in late 1994. Originally, Zip disks launched with capacities of 100 MB, but later versions increased this to first 250 MB and then 750 MB. -
Blu-ray
Blu-Ray is the next generation of optical disc format used to store high definition video (HD) and high density storage. Blu-Ray received its name for the blue laser that allows it to store more data than a standard DVD. Conventional (pre-BD-XL) Blu-ray Discs contain 25 GB per layer, with dual layer discs (50 GB) being the industry standard for feature-length video discs. Triple layer discs (100 GB) and quadruple layers (128 GB) are available for BD-XL re-writer drives -
Cloud storage
Cloud storage is a model of networked enterprise storage where data is stored not only in the user's computer, but in virtualized pools of storage which are generally hosted by third parties. Advantages: Storage maintenance tasks, such as backup, data replication. Cloud storage provides users with immediate access to a broad range of resources and applications hosted in the infrastructure of another organization via a web service interface. But Cloud storage is also a rich resource for hackers
