Educational Revolution

The process of starting a computer and loading the operating system is referred to as “Booting”. To boot a computer is to load an operating system into computer’s main memory or random access memory (RAM). Once the operating system is loaded, it is ready for users to run applications. Operating system generally does the following when you switch on the computer system:- Ø As soon as the computer is turned on, the basic input/output system (BIOS) on your system’s read only memory (ROM) chip is “woken up” and take charge. BIOS is already loaded because it is built into the ROM chip and unlike Random Access Memory (RAM), ROM contents don’t get erased when the computer is turned off. Ø BIOS first does a power-on self test (POST) to make sure that all the computer’s components are operational. Then the BIOS’s boot program looks for the special boot programs that will actually load the operating system on to hard disk. Ø First, it looks for drives at the specific places wher

A computer can process data, pictures, sound and graphics. They can solve highly complicated problems quickly and accurately. Ø Input Unit: Computers need to receive data and instruction in order to solve   any problem. Therefore we need to input the data and instructions into the computers. The input unit consists of one or more input devices. Keyboard is the one of the most commonly used input device. Other commonly used input devices are the mouse, floppy disk drive, magnetic tape, etc. All the input devices perform the following functions. • Accept the data and instructions from the outside world. • Convert it to a form that the computer can understand. • Supply the converted data to the computer system for further processing. Ø Storage Unit: The storage unit of the computer holds data and instructions that are entered through the input unit, before they are processed. It preserves the intermediate and final results before these are sent to the output devices. It also

The use of computer is well recognized, since we are living in the informative society. Information Technology is playing an important role in our lives. It includes telecommunications, microwaves lasers and fiber optics along with computer. There is no area of human life which is not affected by the power of computer systems. Computer is a tool to work with information and to create new information. Following are the applications:- Ø Uses of Computer in Homes: These days, computers are essential for a family like washing machines and refrigerators. They are used for entertainment, watching movies, playing games etc. computers are used to manage finances, working in home away from office, Internet Banking, communication and information sharing, doing homework etc. Ø Computers in Education: More and more schools are adding computer technology to their syllabus so that students may be aware of the computer skills and may use these skills for other subjects also. Computer can

Ø SPEED: Computer is very fast calculating device It can execute basic operations like addition, multiplication, subtraction and division at a few microseconds. Ø ACCURACY: The accuracy of computer does not go down when they are used continuously for hours together. It always gives accurate results. Ø STORAGE: Computer has a very large storage capacity. It has an in-built memory where it can store a large amount of data. We can also store data in secondary storage devices like Floppy disk, Hard disk etc. Ø VERSATILITY: It means computer can perform different types of job efficiently. Computer can work with different types of data and information such as visuals, text, graphics & video etc. at same time. Ø PAPER WORK REDUCED: The computer reduces the paper work of any organization. The required data which was earlier stored in files, drawers and cabinets is now stored in the memory of computer. So Organization can reduce the paper work.  Ø MANP

Definition of computer Ø The term computer is derived from the word ‘computae’ this means to calculate. But today’s computers are not just calculating devices. Ø Computers are versatile; they are capable of performing varied types of jobs and can handle multiple applications at one time. Ø The acronym for computer is: “Common Oriented Machine particularly used for Trade, Education and Research. ” Ø A computer is an electronic device that manipulates information or data. It has the ability to store, retrieve, and process data and gives the output in a desired manner.    History of computer: Ø ABACUS was the first calculating device which was invented by Chinese. It consisted of a frame, which had number of wires and each wire contained some beads. The beads were used for counting and calculations. Here beads were stored at one side of the frame and moving the beads to another side performed calculations. Ø Naier’s Bones: Another accounting device invented by

                                      A gauge consisting of a number of thin blades for measuring narrow gaps or clearance. Precision                    A feeler gauge is a tool used to measure gap width. Feeler gauges are mostly used in engineering to measure the clearance between two parts. They consist of a number of small lengths of steel of different thicknesses with measurement marked on are all on the same hinge, several can be stacked together to gauge intermediate values. It is common to have two sets for imperial units (typically measured in thousandths of an Inch) and metric (typically in hundredths of a millimeter) measurement. Types of feeler gauge:-              There are 6 types of feeler gauges:     1.     GO NOGO feeler gauge     2.   Straight leaf feeler gauge     3.   Tapered feeler gauge      4 .  Double ended gauge       5.   Offset gauge 6.    Feeler strip   All varieties come with metric (mm), imperial (INCH) or both measurement i