Pen Drive

...Guess what I have in my key chain? ... well a pen drive...
A USB flash drive, also known as pen drive is a data storage device that includes flash memory with an integrated Universal Serial Bus (USB) interface. USB flash drives are typically removable and rewritable, and physically much smaller than an optical disc. Most weigh less than 30 grams. Drives of up to 512 gigabytes (GB) are available. Storage capacities as large as 2 TB are planned. Some allow up to 100,000 write/erase cycles. USB flash drives are often used for storage, data back-up and transfer of computer files. They are smaller, faster, have thousands of times more capacity. They are durable and reliable because they have no moving parts. They are immune to electromagnetic interference, and are unharmed by surface scratch. USB flash drives use the USB mass storage standard, supported natively by modern operating systems such as Windows, Linux, OS X 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 handheld devices such as smartphones and tablet computers, though the electronically similar SD card is better suited for those devices.
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 rubberized 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. USB flash drives draw power from the computer via the USB connection. Some devices combine the functionality of a digital audio player with USB flash storage; they require a battery only when used to play music.
The uses of pendrive are as follows:
Personal data transport, Secure srorage of data, application and software files, Computer forensics and law enforcement, Updating motherboard firmware, Booting operating systems, Operating system installation, Backup, Audio players, Security Systems.
...The futuristic is that the trend would be pencil drive, refill drive and then dot drive...