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Wednesday 23 October 2013

PUA KHEIN SENG inventor of the pen drive

Datuk Pua Khein Seng, who has been honoured by Penang for inventing the pen drive, is currently CEO of Taiwan-based Phison Engineering Corporation.
He had invented the flash memory technology in 2001. Yet till today, the USB drive has not changed its characteristics but only grew larger in capacity and usage.
Miniature versions are now thriving in markets and perhaps soon an embedded USB drive version could in the future improve human memory.
Pua, born in Selangor in June 1974, is credited with incorporating the world's first single chip USB flash drive.
He was trained in electrical control engineering at the National Chiao Tung University, Taiwan. He remains a resident in Taiwan.
Today, the pen drive or the USB flash drive is as ubiquitous as floppy disks were in the 1980s.
A USB flash drive is a data storage device that includes flash memory with an integrated Universal Serial Bus ( USB ) interface. USB flash drive are typically removable and rewritable, and physically much smaller than floppy disk.
Most weigh less than 30 grams.
Currently, drives of up to 256 gigabytes ( GB ) are available. A one-terabyte ( TB ) was unveiled at the 2013 Consumer Electronics Show and will be available later this year.
Storage capacities as large as 2 TB are planned, with steady improvements in size and price per capacity expected. Some allow up to 100,000 write/erase cycles, depending on the exact type of memory chip used, and a 10-year shelf storage time.
USB flash drive are often used for the same purposes for which floppy disk or CD-ROMs were used - for storage, back up and transfer of computer files.
They are smaller, faster, have thousand of times more capacity, and are more durable and reliable because they have no moving parts. Until about 2005, most desktop and laptop were supplied with floppy disk drives in addition to USB port, but floppy disk drives have been abondoned due to their lower capacity compared to USB flash drives.
USB flash drives use the USB mass storage standard, supported natively by modern operating systems such as Linux, Mac OS X, Windows, and other Unix-like systems, as well as many BIOS boot ROMs.
USB drives with USB 2.0 support can store more data and transfer faster than much larger optical disc drives like CD-RW or DVD-RW drives and can be read by many other systems such as the Xbox 360, PlayStation 3, DVD players and in a number of handled devices such as smartphones and tablets computers.
A flash drive has no moving parts to be driven; therefore, it's not a true drive. The term drive persists because computers read and write flash drive data using the same systems commands as for a mechanical disk drive, with the storage appearing to the computer operating system and user interface as just another drive.
A flash drive consists of a small printed circuit board carrying the circuit elements and a USB connector, insulated electrically and protected inside a plastic, metal, or rubberised case which can be carried in a pocket or on a key chain, for example.
The USB connector may be protected by a removable cap or by retracting into the body of the drive, although it is not likely to be damaged if unprotected. Most flash drives use a standard type - A USB connection allowing connection with a port on a personal computer, but drives for other interfaces also exist.

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