INTRODUCTION CHARACTERITICS OF COMPUTER

increasing popularity of computers has proved that it is a very powerful and useful tool. the power and usefulness of this popular tool are mainly due to its following characteristics .

 Automatic :

   An automatic machines works by itself without human intervention . computers are automatic machines because once started on a job , they carry out the job ( normally without any hum3an  assistance) until it is finished .However , computers being machines cannot start themselves and cannot go out and find their own problems and solution . we need  to instruct a computer using coded instruction  that specify exactly how it will do a particular job. some of the other characteristic of computer ( such as speed and accuracy ) are because they are automatic and work on a problem without any human intervention.

speed  :  

A  computer is a very fast devices it can perform in a few seconds , the amount of work that a human being  can do in an entire year - if he/she worked day and night and did nothing else . in other words , a computer can do in a few minutes what would take a man his entire lifetime.

while talking about the speed of a computer we do not talk in terms of seconds or even milliseconds(10 by power -3) but  in terms of  microseconds ( 10 by power -6) ,nanoseconds (10by power -9) ,and even picoseconds ( 10 by power -12).  A  powerful of computer is capable of performing several billion (10 by power 9) ,even trillion ( 10 by power 12) , simple arithmetic operations per seconds .

Accuracy :

  in addition to being very fast , computers are very accurate .Accuracy of a computer is consistently high and the degree of its accuracy depends upon its design A computer performs every calculation with the same accuracy ,

However occurs can occur in a computer. these errors are mainly due to human rather than technological weaknesses .For a example , errors may occur due to imprecise by a programmer ( a person who writes instructions for a computer to solve a particular problems ) or incorrect input data . we often refer to computer errors caused due to incorrect input data or unreliable programs as garbage-in-garbage -out ( GIGO).

Diligence  :  

unlike human beings , a computer is  free  from monotony ,tiredness , and lack of concentration . it can continuously work for hours without creating any errors and grumbling. Hence , computers score over human beings in doing routine type of jobs that require great accuracy. If ten million calculations have to be performed , a computer will perform the last one with exactly the same accuracy and spend as the first one.

versatility :  

versatility  is one of the most wonderful things about a computer . One moment it is prep results of an examination , next moment it is busy preparing electricity bills , and in between , it may be helping in office secretary to trace an important  letter in seconds . All that is required to change its talent is to slip in a new program ( a sequence of instructions for the computer ) into it . In brief , a  computer is capable of performing almost any task , if the task can be reduced to a finite series of logical steps.

power of remembering :  

As human being acquires new knowledge, his/her brain subconsciously selects what it feels to be important and retaining in memory. the brain relegates unimportant details to back of mind or just forgets them . this is not the case with computers . A computer can store and  recall any amount of information because f its secondary storage ( a type of detachable memory ) capability. it can retain piece of information as long as a user desire and the user can recall exactly the same   information that he/she had stored in the computer several years ago . A computer forgets or looses certain information only when a user asks it do so. Hence , it is entirely up to the user to make a computer retain or forgets some information .

    No   I.  Q .  

    A computer is not a magical devices . it  possesses no intelligence of its own. its I . Q. is zero , at least until today . it has to be told what to do and sequences . Hence , only  a user determines what tasks a computer will perform . A computer cannot take its own decision in this regard .

No feelings :  

Computer are devoid of emotions . They have no feelings and no instincts because they are machines . Although men have succeeded in building a memory for computer  , but no computer possesses the equivalent of a human heart and soul . Based on your feelings , taste , knowledge , a computers nd experience we often make certain judgements in our day- to- day life whereas,  cannot make such judgements on their own . they make judgements based on the instruction given to them in the form of programs that are written by us ( human beings).  

characteristics of computers.