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Introduction To Computer

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Published in: Basic Computer
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Difference between hardware and software. 

Data C / Vijayawada

year of teaching experience

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Teaches: Accountancy, IT & Computer Subjects, Auditing, BCA Tuition, Civil, Electrical, IT, Robotics

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  1. Computer : It is a electronic device. Invented by "Charles Babbage" * The word computer is derieved from the latin word calculate. Devided into 2 parts; 1. Hardware: [Touchable parts of computer] compute" which means to i. Input Devices: Keyboard, Mouse, Joysticks, Scanners, Bar code raders, Mike, Web cam i i. Output Devices: Monitor (Soft copy), Printers(Hard copy), Speakers, Projectors i i i. CPU: Central Processing Unit 1. AL U: Arithmetic Logical Unit (Math Calculations) Memory Unit (Used to store the data) Internal Memory : RAM External Memory: Hard disk . Control Unit (Operating system) 3. CU 2. Software: [Untouchable parts of computer] It is a source to convert user imaginary into reality. Require a language to communicate with a software. 1. Low Level Language: b [Binary codes] c These binary codes are understandable by the processor so it is also called as machine language. 2. Middle Level Language: Sementic words - with pre defined meaning. * These sementic words are located in applications so it is also called as application language. Eg: Notepad, Word, Excel. . 3. High Level Language: * All programming languages are grouped under high level langauge. Used to create applications for the user. Eg: Cobal, Basic, C, C++, java. Types of applications: 1. 2. Stand-alone application: Runs with in the system. Stored in local hard disk. i. Console applicaions: [Runs in command prompt] . net i i. Windows applications: [Runs on its own window] j ava, . net i i i. Mobile applications: [Runs with in the device] android, silver lights, ios iv. Robotic applications: [Runs in circuit board] Embedded system Distributed applications: * Global access. Stored in web server. i. Web applications: [Runs in browser] html, js, css, java, . net, php..

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