STORAGE DEVICE TIMELINE timeline.

They consist of cylinders with magnetic material capable of retaining information, which is recorded and read by a head whose arm moves in the direction of the drum's axis of rotation. The access to the information is direct and not sequential. It was an early form of computer memory that was widely used in the 1950s and 1960s, invented by Gustav Tauschek in 1932 in Australia. For many machines, the drum formed the main working memory of the machine, with data and programs loaded onto the drum.

Magnetic devices are those data storage devices in which magnetic properties of materials are used to store digital information. They store information on disks. Before it can be used it must be formatted so that it can receive the information; this procedure divides the disk into tracks and sectors in which the information will be stored.

Magnetic tape is a type of data storage medium or media that is recorded in tracks on a plastic strip with a magnetic material. The type of information that can be stored on magnetic tapes is varied, such as video, audio or information. It was developed in the 1930s by AEG Telefunken and was introduced for professional use in 1936. It was widely used in German radio. However, because of World War II its use was restricted to Germany.

Invented by Jan A. Rajchman, this memory was based on isolated cells that had two states, charged and discharged. These states were used to record or unload a bit by temporarily altering the eyelet potential. Capacity: It was designed in 4096 but was manufactured in 256 bits.

It is the most important representative of magnetic disks. It is also called fixed disk, since it is usually inside the computer, however removable hard disks and external hard disks are common.
Since the first hard disks appeared in 1956, data storage technology has evolved by leaps and bounds, although its operation remains faithful to the basics of the first hard disks.

Designed by Herman Hollerith, it was a sheet made of cardboard that was punched in binary code to store data and was the first means of entering instructions and information into computers. Capacity: 80 and 96-column cards could store 80 or 96 input characters (one character per column).
Speed: A typical reader could read between 100 and 2000 cards per minute.

Storage device used to transport information from one computer to another. The most used were the 3 1/2 (so called because of its physical appearance.) ZIP disks and Superdisk Ls-x. They were widely used until the advent of flash memory. Its origin dates back to the 1970s. The first one was produced by Shugart Associates in 1976, and by 1978 there were more than 10 manufacturers producing the famous floppy diskettes.

It stands for Compact Disc Read-Only Memory. As the last part of its name suggests, the data on a CD-ROM is in (read-only) format. It cannot be modified or erased. This feature of the CD-ROM and its large storage capacity allows us to store a large amount of data.
CD-ROM as a format was created in 1979 and by 1980 Sony and Philips had already developed the Compact Disc digital audio system. Initially it was focused exclusively on the high quality music recording market.

The term "optical storage" refers to discs or physical computer storage units that use a visual method to record and read data. One of the most common types of optical storage is a compact disc (CD), in which information is stored on small dots that can be read by a laser. Although optical storage is relatively inexpensive and can hold a good amount of information, sometimes measured in gigabytes of storage, it can also be prone to write errors and may have a limited lifetime.

The DVD standard emerged in 1995 Consortium (DVD Consortium). The DVD drive is the device that refers to the multitude of ways in which data is stored: DVD-ROM (read-only device), DVD-R and DVD+R (allow one-time recording), DVD-RW and DVD+RW (allow recording and then erasing).
Means digital video disc read-only memory. As with CD-ROMs, the information stored on a DVD-ROM cannot be erased. A single DVD-ROM can store up to 7 times more information than a CD-ROM.

The rewritable compact disc, known by the acronym CD-RW, is a type of digital optical disc media used to store any type of information. This type of CD can be recorded multiple times, as it allows the stored data to be erased.
This type of CD can be recorded multiple times, as it allows the stored data to be erased. In 1996, it was developed jointly by Sony and Philips; it began to be marketed in 1997.

DVD-RAM, which emerged in mid-1998, is the most widespread recording format on DVD media and is similar in operation to a hard disk. It stands for digital video disc random access memory. It came as a modification of the storage devices mentioned above, as it allows data to be modified and rewritten on it. The storage capacity of a DVD-RAM is similar to that of a regular DVD (up to 5 GB).

In 2003 that the first Blu-ray drives begin to appear; specifically, the first was the Sony BDZ-S77, a disc recorder that goes on sale in Japan at a price of almost 4000 dollars at the exchange rate. With advances in technology, a new optical storage device emerged: Blue Ray Disc, which replaced DVD-ROM and CD-ROM, as it can store even more data on them. A single Blue Ray Disc can store up to 25-30 GB of data and a dual-layer disc can store twice as much as a single-layer disc.

The first units began to see the light of day in 2006, when Toshiba launched the first HD-DVD player in Japan, shortly before the first Blu-ray was launched. It stands for High Definition Digital Video Disc. These storage devices are a replacement for Blue Ray discs and are used to store high-definition videos on them. A single-layer HD-DVD can store up to 15 GB of data

STORAGE DEVICE TIMELINE

Magnetic Drum

Magnetic Storage

Magnetic Tape

Selectron

Hard Disk

Perforated Card

Floppy or Floppy Disk

CD-ROM

Optical Storage

DVD-ROM

CD-RW

DVD-RAM

Blue-Ray

HD-DVD