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Period: to
78 rpm Records
www.obsoletemedia.org/10-inch-78-rpm-record/
78rpm records were a type of audio-recording phonographic disk with a spiral groove played on a record machine. Their design originated in the phonautograph, which used a vibrating diaphragm to graphically record sound. Early recordings were strictly acoustic, but they later recorded electrical. Though useful at the time, 78 rpm records could only play music for 2-3 minutes at a time and were eventually replaced by new technology. -
Magnetic Tape
http://www.zetta.net/about/blog/history-data-storage-technology
Magnetic tape is a metallic strip used in recording sound, pictures, or computer data. It is used in tape recorders and video tape recordings. It was invented in Germany as pre-World War 1 tensions rose. At the time, all radio was broadcast live; magnetic tape made it possible to record the broadcast and edit it. Because it is a cost-effective way to store a lot of data, these tapes are still in use. -
Period: to
Delay Line Memory
www.lima.co.uk/blog/a-short-history-of-computer-data-storage/
Delay Line Memory is the predecessor of the RAM that uses electrical pulses. Delay Line Memory was used in some of the earliest digital computers. DLM pressed data into sound waves instead of storing it in individual bits. Data could not be called up immediately but would have to be waited on to arrive. After the invention of RAM, the difficult-to-use DLM became pointless. -
Hard Disk
http://www.zetta.net/about/blog/history-data-storage-technology
A hard disk is a rotating platter that stores and retrieves digital bits of information from a flat magnetic surface. A hard drive is used in any hard drive computer. HDDs use random-access-memory, so they can access blocks of data in any order. Because they are a nonvolatile-memory system, they store data, even when powered off. HDDs are still used for most computers because they are convenient and inexpensive. -
Period: to
8-Track Tape
www.recording-history.org/HTML/8track1.php
The 8-Track tape consisted of an endless loop of standard 1/4 inch magnetic tape in a plastic cartridge. The 8-Track Tape was used in tape recorders. It was a magnetic tape used for audio recording. It was popular in the 1960s-1970s. However, advancements in tape and noise reduction made them completely obsolete by the early 1980s. -
DRAM
http://www.innovateus.net/invention/dynamic-random-access-memory
DRAM, or Dynamic Random-Access Memory, is a type of random access memory that stores each bit of data in a separate capacitor within an integrated circuit. DRAM is used in any desktop computer. In DRAM, there is only one transistor and a capacitor required per bit. Though it stores less, DRAM takes up less space and can be stored more easily than its RAM counterpart. -
Floppy Disk
https;//en.wikipedia.org/wikiHistory_of_the_floppy_disk
Disc storage medium is composed of a disc of thin, flexible magnetic storage medium, readable by a floppy disc drive and sealed in a rectangular plastic carrier. Floppy Disks are used in computers, laptops, and other devices for moving information. They were once installed in computers but are now mostly external drives. Though they still have some limited uses, the floppy disk has been passed up by units with greater storage capacity. -
Period: to
Video Home System
https://en.wikipedia.org/wiki/VHS
VHS was a video recording media on tape cassettes. They were invented in Japan in 1976 and came to the US in 1977. VHS and Betamax fought for popularity in the 1980s, and VHS came out as the prominent system used in most homes. At their peak in the 80s and 90s, Video Home Systems revolutionized home video, but due to the invention of the CD and optical disk, they became obselete.
