Basic information of computer hl sharma converted
- 2. D EFIN ITIO N O F CO M PUTER ❑ A computer is a man made electronic machine which stores, reads and processes data to produce meaningful information as output. It is made of English word ‘to compute’. A computer accepts data from and input device and processes it into useful information which it displays on its output devices. ❑ A computer is a collection of hardware and software components that helps us to accomplish many different tasks. Computer cannot works on their own. They do what we want them to do, only we give them the right command. Its memory is better then human memory.
- 3. The common characteristics that makes computers of all sizes such a powerful machine are speed, accuracy and reliability, storage, automation etc. ❖ Speed- computer can calculate at very high speed. ❖ Storage – computers have their main memory and auxiliary memory system. A computer can store a large amount of data. ❖ Automation – computers can be programmed to perform a series of complex tasks, involving multiple programs. Computer will perform things flawlessly. ❖ Versatility- the wide use of computers in so many areas such as commerce, scientific applications, education in day to day life is ample evidence of its versatility. ❖ Diligence- diligence means being constant and earnest in efforts and application.
- 4. HARDWARE ❑ Hardware is the physical aspect of computers. The hardware are the parts of computer itself including the CPU, memory, keyboards, monitor, drives etc. ❑ And other parts called peripheral components or drives which include printers, modems, scanners etc. SOFTWARE ❑ The set or series of instruction called software. It is the combination of instruction and data, that forms the building blocks of applications such as word processor, computer game or spreadsheet. ❑ Software is divided into two categories. System software and application software
- 5. SYSTEM SOFTWARE ❖ OPERATING SYSTEM ❖ TRANSLATOR ❖ DBMS ❖ UTILITY ❖ DATA COMMUNICATION SOFTWARE APPLICATION SOFTWARE ❖ MEDICAL SOFTWARE ❖ EDUCATION SOFTWARE ❖ BUSINESS SOFTWARE ❖ ENTERTAINMENT SOFTWARE