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Input & Output Devices

Input & Output Devices Of a Computer INPUT DEVICES   Data and instructions are entered into a computer through input devices.  An input device converts input data and instructions into a suitable binary form, which is stored in main memory of a computer. 1. Keyboard  Computer keyboard is an electromechanical component. It Creates special standardized electronic codes when a key is pressed. The codes are transmitted along the cable that connects the keyboard to the computer system unit or terminal, where the incoming code is analyzed and converted into the appropriate computer usable code. Keyboards come in a variety of sizes and shapes having a number of features in common. 2. Mouse The mouse is an input device that is much in use nowadays in graphics as well as when working with the GUI (Graphical User Interface). It slides on a rubber ball in mechanical mouse and laser rays in optical mouse, and has two or more button on the top. when a mouse is slid across a f
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Inventions and Inventors/Founders

Inventions and Inventors/Founders COMPUTER - Charles Babbage MOUSE - Doug Engelhard Computer Keyboard - Christopher Latham Sholes RAM - Robert Dennard PRINTER - Chester Carlson LINUX - Linus Torvalds UNIX - Dennis Ritchie MICROSOFT WINDOWS - Bill Gates and Paul Allen GOOGLE - Larry Page ,  Sergey Brin YAHOO - Jerry Yang and David Filo REDIFF - Ajit Balakrishnan MOZILLA FIREFOX - Dave Hyatt  and  Blake Ross EMAIL – It’s a Confusion between Shiva Ayyadurai & Ray Tomlinson.  WWW (World Wide Web) - Tim Berners-Lee APPLE iPhone – Steve Jobs AMAZON - Jeff Bezos FLIPKART - Binny Bansal ,  Sachin Bansal Ebay - Pierre Omidyar ALIBABA.COM - Jack Ma ,  Peng Lei SNAPDEAL - Kunal Bahl & Rohit Bansal HCL (Hindustan Computers Limited) -  Shiv Nadar &  Arjun Malhotra Smartphone – IBM (Smartphone named as SIMON) Headphones - Nathaniel Baldwin ATM machine - John Adrian Shepherd-Barron & Donald Wetzel
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Computer Keyboard

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Computer Keyboard                          Computer Keyboard is an electro-mechanical  component. It creates special standardized electronic codes when a key is pressed. The codes are transmitted along the cable that connects the keyboard to the computer system unit or terminal, where the incoming code is analyzed and converted into appropriate computer usable code. Keyboards comes in a variety of sizes and shapes having a number of features in common. A Computer Keyboard is a primary input device which is used in computers to input data. The computer keyboard has a keys like a typewriter it look likes typewriter. These keys are called QWERTY keys. These keys are 0-9 and character keys like A-Z and special symbols like ~!@#$%^& etc. The Keys on the top of the Keyboard are called Function Keys . It starts from F1 to F12 , these are programmable keys. Special Purpose Keys Backspace Key       Backspace key erases one character to the left of the cursor. Enter Key
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