YouCanUpdateYourself

                                                       A CAPTCHA an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart". It is a type of challenge response test used in computing to determine whether the user is human or not.                                                             The term was coined in 2003 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford. The most common type of CAPTCHA was first invented in 1997 by two groups working in parallel:  Mark D. Lillibridge, Martin Abadi, Krishna Bharat, and Andrei Z. Broder; and Eran Reshef, Gili Raanan and Eilon Solan. This form of CAPTCHA requires that the user type the letters of a distorted image, sometimes with the addition of an obscured sequence of letters or digits that appears on the screen. Because the test is administered by a computer, in contrast to the standard Turing test that is administered by a human, a CAPTCHA is sometimes described as a reverse Tu

What is USB and what are the types and versions of USB?   In almost all electronic devices we can see USB ports. So, basically what is USB. Here we go, USB stands for Universal Serial Bus. The development of USB began in 1994 by 7 eminent companies like IBM, Intel, Microsoft, DEC, NEC, Compaq and Nortel. These companies appointed Ajay Bhatt as the head of the project to develop USB. So, he is the co-inventor of USB. The main objective of this project is to connect peripheral devices like printers, external displays, hard drives, digital cameras and so on to our PC’s(computers). Hence he and his team came up with the invention of USB while working at Intel. By using USB ports on both the devices and the corresponding USB cable we can connect both the devices and hence communicate with each other. Communication means exchange of data among themselves. Hence it is achieved by Wired communication. Versions of USB or The Evolution of USB : Ø   Basically USB version indicates th