Computer_Application.pptx introduction to computer

Computer_Application.pptx introduction to computer

• 1.
  COMPUTER APPLICATION BASIC CONCEPTS OFCOMPUTER BY BOBSON BUA IT SPECIALIST
• 2.
  INTRODUCTION A Computer IsA Programmable Machine Designed To Perform Arithmetic And Logical Operations Automatically And Sequentially On The Input Given By The User And Gives The Desired Output After Processing. COMPONENT OF A COMPUTER Computer components are divided into two major categories 1. Hardware eg. monitor, keyboard, mouse etc 2. Software eg. software are the set of programs that make use of hardware for performing various functions
• 3.
  CHARACTERISTICS OF COMPUTERS •Speed • Accuracy • Accuracy • Diligence • Versatility • Storage capacity
• 4.
  COMPUTER SYSTEM Computer systemconsists of mainly four basic units; namely input unit, storage unit, central processing unit and output unit A computer performs five major operations or functions irrespective of its size and make. These are it accepts data or instructions as input, it stores data and instruction it processes data as per the instructions, it controls all operations inside a computer, and it gives results in the form of output.
• 5.
  FUNCTIONAL UNITS OFA COMPUTER Input Unit: This unit is used for entering data and programs into the computer system by the user for processing Storage Unit: The storage unit is used for storing data and instructions before and after processing. Output Unit: The output unit is used for storing the result as output produced by the computer after processing. Processing: The task of performing operations like arithmetic and logical operations is called processing. The Central Processing Unit (CPU) takes data and instructions from the storage unit and makes all sorts of calculations based on the instructions given and the type of data provided. It is then sent back to the storage unit. CPU includes Arithmetic logic unit (ALU) and control unit (CU)
• 6.
  COMPUTER MEMORY Computer’s memorycan be classified into two types; primary memory and secondary memory PRIMARY MEMORY primary memory can be further classified as ; • RAM- Random Access Memory is the place in a computer where the operating system, application programs and the data in current use are kept temporarily so that they can be accessed by the computer’s processor. it is said to be ‘volatile’ since its contents are accessible only as long as the computer is on. • ROM- Read Only Memory is a special type of memory which can only be read and contents of which are not lost even when the computer is switched off
• 7.
  SECONDARY MEMORY These includedevices that are peripheral and are connected and controlled by the computer to enable permanent storage of programs and data Hard Disk (HDD) Compact Disk (CD) Digital Video Disk (DVD) (1GB TO ITB AND MORE) (650-700 MB) (CAN STORE SEVERAL GIGABYTES OF DATA)
• 8.
  INPUT / OUTPUTDEVICES: These devices are used to enter information and instructions into a computer for storage or processing and to deliver the processed data to a user INPUT DEVICES An input device is any device that provides input to a computer. There are many input devices, but the two most common ones are a keyboard and mouse Every key you press on the keyboard and every movement or click you make with the mouse sends a specific input signal to the computer.
• 9.
  KEYBOARD /MOUSE The keyboardis very much like a standard typewriter keyboard with a few additional keys. the basic qwerty layout of characters is maintained to make it easy to use the system Keyboard Mouse
• 10.
  OTHER INPUT DEVICES Trackball:a trackball is an input device used to enter motion data into computers or other electronic devices. Touchpad: A touch pad is a device for pointing (controlling input positioning) on a computer display screen. It is an alternative to the mouse Touch screen: it allows the user to operate/make selections by simply touching the display screen. a display screen that is sensitive to the touch of a finger or stylus. widely used on atm machines, retail point-of-sale terminals, car navigation systems, medical monitors and industrial control panels.
• 11.
  OUTPUT DEVICES Output devicereceives information from the CPU and presents it to the user in the desired from. the processed data, stored in the memory of the computer is sent to the output unit, which then converts it into a form that can be understood by the user. • Monitor • Printer • Impact Printers • Non-impact • Plotter • Sound Cards And Speaker(s):
• 12.
  THANKS YOU "BEGIN THEJOURNEY"