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Introduction and types of computers.

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A computer is an electronic machine, which takes, inputs data instructions into it, store it, process it and produces output in desired form.

Characteristics of computers :-

*Never makes mistakes.

*A smart machine.

*Work very fast.

*Never gets tired.

*Stores many things like words, numbers and pictures.

*Can work different tasks as it gets order from you.

Types of computers :-

1. Analog computers:- Analog Computers uses Analog signals that are represented by continuous set of voltages, used in scientific research centres, hospitals and flight centres.


Note:- Analog computers are faster than digital computers.








2. Hybrid Computers:- Hybrid computers combines both analogue and digital features and operations.




3. Digital computers:- Digital computers uses electrical input, represented by 0 and 1 or OFF and ON state. Digital computers recognize data by counting signal of (0 to 1).


Note:- Digital computers work only on 0 and 1.

Types of digital computers:-

* Mini Computers:- Faster than micro computer CPU, Speed approximately 500 instruction per second, used in payroll, invoicing etc.



* Mainframe computer:- They is very large computer with high capacity of main storage and is used in big companies, banks, etc.



* Super computer:- Super computer is that where in many computation can be performed simultaneously and used in scientific applications like weather forecasting.


Micro Computer:- Smallest in size as it uses micro processor or used as home computer.

Types of Micro computers:-

1. Personal computer:- These Computers are used by one person at a time as his/her own personal computer. He/She keeps his/her data and the programs required by him/her on the computer.


2. Portable computer:- Portable computers are those Micro computers which can be easily carried around. All these computers use LCD (Liquid Crystal Display) for reduce weight and power requirement.

Types of Portable computers:-

* Laptop:- Laptops use battery power and can be used on the lap as name suggest "Laptops". It is ideal for users who have to work in traveling.


* Note Book:- Note Book is smaller and has lesser capacities in comparison to laptop. It can easily fit into any briefcase, so ideal for users who are frequent-flyers and life-on-the-road.



* Palmtop:- Palmtop is touch screen and memory card for storage. It is much smaller than notebook and uses personal organization tools. It is ideal for the users who use machine day-today activities.



* Tablet PC:-Tablet PCs are mobile computers that are larger than a mobile phone or can say wireless personal computer (PC). They have the touch screen technology.

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Internet

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हिंदी

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Internet stands for International Network of computers, it is the largest information base and has become a vital part of our lives. Internet is changing the world even in more radical ways than we ever think. Tasks that were once done mostly through personal interaction, such as banking, shopping or communication can now be done online.



Using internet, we can share data and information across the globe instantly. Internet has made the world smaller, and a better place to live in. Today the buzzword is only INTERNET. The network of Internet is getting wider with every passing day. To analyze how fast the use of internet is growing, just pick any newspaper or magazine and carefully observe the advertisements given in them, You would realize that almost every company has its website listed in addition to its address and telephone numbers. Every organization is making its presence felt on the Internet.

Internet is a network of notworks which consists of inter-connected networks. It is a worldwide network of computers that uses common communication standards and interfaces to provide the physical backbone for a number of interesting applications.




Using Internet we can review newspapers, magazines, books, listen to music, watch movies, play games,keep ourself updated with current events, go for online shopping, know about recipes, check airline schedules and railway reservations,send e-mail, and much more .





Networking Concept

इंटरनेट

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English

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इंटरनेट कंप्यूटर के अंतर्राष्ट्रीय नेटवर्क के लिए खड़ा है, यह सबसे बड़ा सूचना आधार है और यह हमारे जीवन का एक महत्वपूर्ण हिस्सा बन गया है। इंटरनेट कभी भी सोचने की तुलना में दुनिया को और अधिक कट्टरपंथी तरीकों से बदल रहा है। कार्य जिन्हें एक बार व्यक्तिगत बातचीत के माध्यम से किया जाता था, जैसे बैंकिंग, खरीदारी या संचार अब ऑनलाइन किया जा सकता है।



इंटरनेट का उपयोग करके, हम तुरंत दुनिया भर में डेटा और जानकारी साझा कर सकते हैं। इंटरनेट ने दुनिया को छोटा बना दिया है, और रहने के लिए एक बेहतर जगह है। आज buzzword केवल इंटरनेट है। हर गुजरते दिन इंटरनेट का नेटवर्क व्यापक हो रहा है। विश्लेषण करने के लिए कि इंटरनेट का उपयोग कितनी तेज़ी से बढ़ रहा है, कोई अखबार या पत्रिका चुनें और उन में दी गई विज्ञापनों का सावधानीपूर्वक पालन करें, आपको पता चल जाएगा कि लगभग हर कंपनी की वेबसाइट पर इसके पते और टेलीफोन नंबर के अतिरिक्त सूचीबद्ध है। हर संगठन इंटरनेट पर अपनी उपस्थिति महसूस कर रहा है।

इंटरनेट नॉटवर्क्स का एक नेटवर्क है जिसमें इंटर-कनेक्ट नेटवर्क शामिल हैं। यह कंप्यूटर के एक विश्वव्यापी नेटवर्क है जो कई दिलचस्प अनुप्रयोगों के लिए भौतिक रीढ़ की हड्डी प्रदान करने के लिए सामान्य संचार मानक और इंटरफेस का उपयोग करता है।




इंटरनेट का उपयोग करके हम समाचार पत्रों, पत्रिकाओं, किताबों, संगीत सुन सकते हैं, फिल्में देख सकते हैं, खेल खेल सकते हैं, वर्तमान घटनाओं के साथ खुद को अपडेट कर सकते हैं, ऑनलाइन खरीदारी के लिए जा सकते हैं, रेसिपी के बारे में जान सकते हैं, एयरलाइन शेड्यूल और रेलवे आरक्षण की जांच कर सकते हैं, ई-मेल भेज सकते हैं, और बहुत अधिक ।

Firework code

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Cracking fireworks

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Posted by:-Chairman and founder Omji