What is USB? History of USB Versions Usb hubs Applications

1. USB

2. CONTENTS:
1. Definition and Brief History of USB
2. Versions of USB
3. Difference between USB 2.0 and USB 3.0
4. USB Hubs
5. Applications of USB

3. What is USB?
 USB stands for UNIVERSAL SERIAL BUS.
 It allows a person to connect an electronic device to a computer.
 It is intended to replace many varieties of serial and parallel ports.
History of USB
 The first version of USB was created by a group of companies in 1995.

4. Versions of USB
USB 1.0 was released in 1995,specified data rates of 1.5
Mbit/s (Low speed).
USB 1.1 was released in 1998,12 Mbit/s data rate.
USB 2.0 was released in 2000, 480 Mbit/s data
rate(Higher speed).
USB 3.0 was released in 2008, rate up to
5Gbit/s(superspeed).

5. Differences between USB 2.0 AND USB 3.0

6. USB Hubs
 An USB hub is a special USB device.
 It allows to connect more than one device to an USB port on the computer.
 This is done by providing more USB ports.

7. Applications of USB
The USB are generally use to connect the device from the computer such as
 Mouse
 Keyboards
 Digital cameras
 Printers
 Personal media players
 Flash drives
 External hard drives

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