A hard disk drive (HDD), hard disk, hard drive, or fixed disk[b] is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage and one or more rigid rapidly rotating platters coated with magnetic material.
invented by John Ambrose Fleming
A vacuum tube, electron tube, valve (British usage), or tube (North America),…
invented by Fujio Masuoka
Flash memory (both NOR and NAND types) is invented in Japan by Fujio Masuoka…
invented by IBM
The IBM Simon Personal Communicator (simply known as IBM Simon) is a handheld,…
invented by Chuck Hull
Stereolithography (SLA or SL; also known as stereolithography apparatus,…
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