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The development of electronic computers can be divided into tive generations depending upon the technologies used. Each generation has its individual characteristics.  First Generation (1940-1956) The first generation of computers used vacuum tubes as circuits and magnetie drums for memory. These tubes produced a lot of heat and were prone to frequent fusing of the installations and therefore, were very expensive and could be afforded only by large organisations. The input to the computer was through punched cards and paper tapes. The output was displayed as printouts. These computers relied on 'machine language' (which is in the form of '0' and 1). These computers were limited to solving one problem at a time.   Second Generation (1956-1963) Transistors replaced the vacuum tubes of the first generation of computers. Transistors allowed computers to become smaller, faster, cheaper, energy efficient and reliable. They were superior to the vacuum tubes. They still r...

Mouse is an input device. With a click of a button, the mouse sends information to the computer. The mouse is an interesting device that offers an alternative way to interact without the computer beside a keyboard. A typical mouse has two buttons. At the top of the device you will find a left and right button which allows "clicks". There is a scrolling wheel between the two buttons. A mouse consists of a metal or plastic housing or casing, a ball that sticks out of the bottom of the casing and is rolled on a flat surface, one or more buttons on the top of the casing, and cable that connects the mouse to the computer. As the ball is moved over the surface in any direction, a sensor sends impulses to the computer. Nowadays, optical mice are also very popular. It is an advanced computer pointing device that uses a light-emitting diode (LED), an optical sensor, and digital signal processing (DSP) in place of the traditional mouse ball and electromechanical transducer. Movement i...

भारत के किन राज्यों में उर्दू को द्वितीय भाषा का दर्जा प्रदान किया गया है ?  बिहार और उत्तर प्रदेश  भारत में सर्वप्रथम भूमिगत ट्रेन कब और कहां चली थी ? 21 अक्टूबर, 1984 को कोलकाता में भारत में  आपातकाल की घोषणा कब हुई थी ? 26 जून 1975 को  भारतीय रिजर्व बैंक की स्थापना कब हुई थी ? 1935 में भारत में सबसे बड़ा होटल कौन सा तथा कहां है? दक्षिण मुंबई स्थित ओबराय शेरटन जो समुद्र के किनारे बना है भारतीय गणराज्य के प्रथम सभापति कौन थी? डॉ जाकिर हुसैन  भारत के प्रथम ब्रिटिश गवर्नर जनरल कौन थे? वारेन हेस्टिंग्स  भारत में महलों का शहर कौन सा है और उसकी स्थापना किसने की? कोलकाता, जाबकारनाक द्वारा हाथ पर पौधा उगाने वाले भारतीय का क्या नाम था ? डाकोर की रामदास वोधानी?  भारत में सबसे प्रथम बार किसने के द्वारा क्रिकेट खेला गया था और कब अंग्रेजों द्वारा सन 1933 में  दिल्ली का लाल किला किसने बनवाया है शाहजहां ने  वह भारत का कौन सा न्यायधीश था जिसे 19 वर्ष तक सिर नीचे पैर ऊपर करके न्यायालय में मुकदमे की सुनवाई करने का अद्भुत बीमारी थी इंफाल के नए न्या...

There are various factors, which are responsible for various accidents. These factors are stated below: 1. Lack of Knowledge . Lack of knowledge is a curse. A number of accidents happen only due to lack of knowledge. If we do not have a complete knowledge about machine and still handle it, there are ample chances to meet the accident. So, lack of knowledge may lead us towards accidents, which can be fatal for our life. 2. Cautionlessness . Cautionlessness is also a major factor which is responsible for accidents. It is also said, "cautionlessness causes accidents." Most commonly, it is seen that most of the accidents on roads happen only due to heedless driving. If we are attentive, accidents can be avoided up to a great extent. 3. Carelessness . Owing to over-confidence, a person becomes careless. There are a number of places such as roads, industries, factories and the agriculture, etc. where most of the people are entrapped in accidents due to carelessness. 4. Pensive...

Social media has altered the way we communicate today, acronyms & abbreviations, hashtags. neologisms, visuals like images and GIFS are generally employed as a medium of digital chattine to express our opinions and feelings. But you must have realized that visuals are not enough, theu have limitations of their own and text is required for fair expressions of thoughts. A thesaurus is a great tool by which you can look up potential synonyms for a word in your document, It suggests alternative words and other adjectives, and also helps you to enrich your vocabulary. To use the Thesaurus, follow these steps: Select a word. Click on the REVIEW tab.  Click on the Thesaurus under Proofing options. A list of words will appear to the right of your screen. To replace your selected word with one of the words from the list, point to it, click the down arrow, » Click Insert Or » Click Copy (to copy and paste) You can also access Thesaurus by: 1. Using keyboard shortcut...

A diet which consists of all the essential food constituents viz. proteins, carbohydrates, fats, minerals, vitamins and water in correct proportion is called Balanced Diet. In other words, 'Balanced Diet is that diet which consists of various constituents of food in accurate and appropriate quantity and quality according to the requirement of an individual. In fact, every individual does not require same type of diet. It differs from child to child and to person. Importance of Balanced Diet For appropriate growth, development and wellness of a person, the balanced diet has been accepted as the best diet. The balanced diet helps in keeping a person healthy and fit. There are various nutrients in such a diet which provide strength and energy to the body and keep away the diseases. The required calories can be taken from balanced diet. In addition to this, there are different types of nutrients in the balanced diet which make the food tasty. These nutrients are beneficial for se...

जन गण मन अधिनायक जय हे , भारत भाग्य विधाता ।  पंजाब , सिन्ध , गुजरात , मराठा , द्राविड़ , उत्कल बंग । । विंध्य , हिमाचल , यमुना , गंगा , उच्छल जलधि तरंग । तव शुभ नामे जागे , तव शुभ आशिष माँगे , गाहे तव जय गाथा । ।  जन , गण , मंगलदायक जय हे , भारत भाग्य विधाता ।  जय हे , जय हे , जय हे , जय , जय , जय , जय हे । ।