Computer Concepts With SD

OPERATING SYSTEM An Operating system is a program that acts as an interface between the user of a computer and computer hardware. The purpose of an operating system is to provide an environment in which user can execute programs in a convenient and efficient manner. It is the first program loaded into the computer's memory after the computer is switched on. Popular operating systems include MS-DOS, OS/2. Windows and UNIX. The operating system is an important component of the computer system, because it sets the standards for the application programs that run on it. All programs must be written in a manner, which is recognized by the operating system. An Operating System is like a soul of a computer, Without an Operating System  a computer considered as dead, It has no use. Functions of Operating System 1. Memory Management Function An Operating System manages the primary memory of the system. It allocates the memory, on the request of a process, which is being run at

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

Android Versions Did you noticed that the android versions are started alphabetically from A to Z, and now it’s on N. The development of android started in 2003 by Android Inc. Which was purchased by google in 2005. The two internal releases was Alpha and Beta and later the series continued from initial letter C. The Names of android versions are set on the Sweets. Let’s see the Versions of Android.                                                              Android 1.0           Released on September 23, 2008 Android 1.1 ( Internally Knows as “Petit Four”)            Released on February 9, 2009 Cupcake (Android 1.5)               Released on April 30, 2009 Donut     (Android 1.6)                   Released on September 15, 2009 Éclair  (Android 2.0, Android 2.1)                       Released on October 26, 2009 Froyo  

WINDOWS VERSIONS Windows 1.0 In 1985 the first version of windows was a milestone product because it allowed PC users to switch from the MS-DOS method of typing commands at the C prompt. Use a mouse to point and click their way through functions, such as starting applications, in the operating system. Windows 1.0 Screen  Windows 2.0 In 1987 with the second version of Windows, Microsoft took advantage of - The improved Processing speed of the Intel 286 Processor. Expanded Memory. Inter-application communication capabilities using Dynamic Data Exchange (DDE). Windows 2.0 featured support for VGA graphics standard, Allowed users to: - Overlap Windows. -Control Screen layout. -Use Keyboard. -Combinations to move rapidly through Windows Operations. Windows 2.0 Screen Layout Windows 3.0                  In 1990, Microsoft's first mainstream computing platform offered 32 bit performance, advanced graphics, and full sup