INTRODUCTION TO COMPUTER

 There are several computer systems in the market with a wide variety of makes, models , and peripherals. In general, a computer system comprises following four components: 1. Central Processing Unit (CPU): This unit performs processing of instructions and data inside the computer. 2. Input Unit: This unit accepts instructions and data. 3. Output Unit: This unit communicates the results to the user. 4. Storage Unit: This stores temporary and final results.  1. Central Processing Unit (CPU): Central processing unit is the "administrative" section of the computer system. It interprets, coordinates the operations, and supervises the instructions. CPU works with data in discrete form, that is, either 1 and 0. It counts, lists, compares, and rearranges the binary digits of data in accordance with the detailed program instructions stored within its memory.The CPU itself has three parts: (a). Arithmetic Logic Unit (ALU): This unit performs the arithmetical and logical operations...

 Increasing popularity of computers has proved that it is very powerful and useful tool.  The power and usefulness of this popular tool are mainly due to following characteristics: 1.Automatic : An automatic machine work by  itself without human intervention. Computers are automatic machines because once started a job, they carry out the job until it is finished. Some of other characteristics of computers(such as speed and accuracy) are because they are automatic and work on a problem without any human intervention. 2.Speed : A computer is a very fast device. 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 is a few minutes what would take a man his entire lifetime. Speed of computers is measured in terms of milliseconds , microseconds, nanoseconds or picoseconds. 3.Accuracy : In addition to being very fast, computers are very accurate. ...

  We can categorize computer in two ways: on the basis of data handling capabilities and size. On the basis of data handling capabilities , the computer is of  three  types: Analog Computer Digital Computer Hybrid Computer 1) Analog Computer Analog computer are designed to  process analog data . Analog data is continuous data that changes continuously and cannot have discrete values. We can say that analog computers are used where we don't need exact values always such as speed, temperature, pressure and current. Analog computers directly accept the data from the measuring device without first converting it into numbers and codes. They measure the continuous changes in physical quantity and generally render output as a reading on a dial or scale.  Speedometer  and  mercury thermometer  are examples of analog computers. 2) Digital Computer Digital computer is designed to perform calculations and logical operations at high speed. It accepts the raw ...

 1. "In simple words,a Computer is an electronic device which processes information based upon the             instructions,provided and generates the desired output."       "In other words ,the term computer is used to describe a device made up of a combination of                   electronic and electromechanical computers."  2. "So,we can say that a Computer is a machine,totally at the command of the user,which can perform        operations at a much higher speed than a human being." 3. "In the simplest definition ,A Computer is an electronic device-a flexible machine that can                        manipulate data."     "A Computer is an electronic machine ,operating under the control of instructions stored in its own         memory that can accept data(input),m...

A computer is a machine that handles data.Data are facts that are gathered and entered into the computer.The computer stores,retrieves,sends,receives,analyzes and synthesizes,that data to produce information.Information is any collection of word ,numbers and symbols organized so that it is meaningful to the person using it. Data are generated by many sources.The computer organizes the data from many sources and turns them into information that can be applied in making decision and solving problems.  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- HINDI TRANSLATE एक कंप्यूटर एक मशीन है जो डेटा को संभालती है। डेटा वे तथ्य हैं जो कंप्यूटर में इकट्ठा होते हैं और कंप्यूटर में प्रवेश होते हैं। कंप्यूटर स्टोर, सूचनाओं का उत्पादन करने के लिए डेटा भेजता है, प्राप्त करता है, प्राप्त करता है, विश्लेषण करता है और संश्लेषित करता है। सूचना शब्द, संख्या और का कोई भी सं...