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About computer

Computer  Computer is an electronic machine which is used  to perform special task. The word computer is derived from a LATIN word 'COMPUTE',  which means 'to calculate' CHARLES BABBAGE is known as  father of computer . World's First electronic computer is ENIAC.  
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Poem

A girl too soft She's soft                                                                                                                                                            not weak;                                                                                                                        ...
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The hero within: Immunity

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Immunity The ability of body to resist the infection caused by pathogens. There are two types of immunity  1.Innate (by birth) 2.Acquired 1. Innate- the immunity present is humans by birth innate immunity are of following type i. Physical barrier- also known as first   line of defense. skin would be the example. ii. Physiological barrier- also known as second line of defense.  tears , saliva which have lysosyme   would be the example. iii.  Psychological barrier- it includes PMNL cells(poly morphic nucleus leucocytes) like monocytes , neutrophils, leucocytes. They are phagocytes in nature that fed on other cells. iv. Cellular barrier- they consist of INF cells (interferon). They are also known as third line of defense. 2. Acquired immunity- the immunity person acquired during his lifetime is known as acquired immunity. acquired immunity are of two types i. B cell- form in bone marrow and differentiated in bone marrow ii. T cell- form in bone marrow and diff...
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