What is Computer Sabheeta Academy of Computer Science

What is Computer? Sabheeta Academy of Computer Science & Information Technology, Hingorja

Defination: n n Computer is an electronic machine which accepts data from user and after processing gives us output. It performs two major functions, the Processing and Logical Decision Making. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Points: n n n Electronic Machine Accept Data Processing Decision Making Output Sabheeta Academy of Computer Science & Information Technology, Hingorja

Features of Computer? n n n Speed Storage Accuracy Reliability Diligence Versatility Sabheeta Academy of Computer Science & Information Technology, Hingorja

Parts of Computer? Sabheeta Academy of Computer Science & Information Technology, Hingorja

Four Essential Parts of Computer Sabheeta Academy of Computer Science & Information Technology, Hingorja

Basic Function of a Computer? ? ? Input Processing We give our input with the help of input devices Output Computer return our results through output devices. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Input Devices? n n n n n Keyboard Mouse Scanner Micro Phone Digital Camera Joystick Track Ball Touch Pad Light Pen Sabheeta Academy of Computer Science & Information Technology, Hingorja

Keyboard? ? Sabheeta Academy of Computer Science & Information Technology, Hingorja

Keyboard n n n It is an input device through which we give our data & instructions to computer by pressing its buttons, it has various type of keys. Alphabetical Keys ( A to Z) Numerical Keys (0 to 9) Functional Keys (F 1 to F 12) Special Functional Keys (Alt, CTRL, Enter, Arrow) etc Sabheeta Academy of Computer Science & Information Technology, Hingorja

Mouse? Sabheeta Academy of Computer Science & Information Technology, Hingorja

Mouse: n It is an Input Devices Through which we give our Instructions to computer by clicking its buttons (Left & Right), it also perform the dragging (Dreg & Drop) Sabheeta Academy of Computer Science & Information Technology, Hingorja

Scanner? ? Sabheeta Academy of Computer Science & Information Technology, Hingorja

Scanner: n It is an input Device through which we convert our hard copy document into soft copy document, It means we can insert our printed data into computer with the help of a Scanner. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Micro Phone Sabheeta Academy of Computer Science & Information Technology, Hingorja

Micro Phone: n It is an input Device through which we record our sound in computer. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Digital Camera Sabheeta Academy of Computer Science & Information Technology, Hingorja

Digital Camera n It is an input device through which we capture our pictures and than insert & edit in computer. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Track Ball Sabheeta Academy of Computer Science & Information Technology, Hingorja

Track Ball n It is also an input device which is used on behalf of a mouse and perform same functions of a mouse, but used in Micro computers. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Touch Pad Sabheeta Academy of Computer Science & Information Technology, Hingorja

Touch Pad n In Portable computers like Laptop Computer we use touch pad on behalf of a mouse, we move our finger on it to move the cursor. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Light Pen Sabheeta Academy of Computer Science & Information Technology, Hingorja

Light Pen n It is used to write on the screen, in Touch Screen Monitors we use Light Pen to write some thing on behalf of a Keyboard. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Joystick Sabheeta Academy of Computer Science & Information Technology, Hingorja

Joystick n It is a gaming device which we connect with our Computer to play any game, through Joystick we give instructions in playing games, that’s why it is also an input device. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Output devices n n Through Output devices computer Communicate with its user. The Devices through which we see results, or we get some thing in return of given data. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Output Devices? n n n Monitor Printer Speakers Sabheeta Academy of Computer Science & Information Technology, Hingorja

Monitor/LCD (Liquid Crystal Display) Sabheeta Academy of Computer Science & Information Technology, Hingorja

Monitor n It is an output device which display results on the screen, it is a soft copy output device shows the activities on screen which a computer is performing. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Printer Sabheeta Academy of Computer Science & Information Technology, Hingorja

Printer n n It is a hard copy output device which print our data permanently on the paper. We can print any application, letter, CV or any other document on the paper with the help of a printer. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Speakers Sabheeta Academy of Computer Science & Information Technology, Hingorja

Speakers n Speakers are also output device because when we play any music file they start producing sound. Sabheeta Academy of Computer Science & Information Technology, Hingorja

What’s Next? ? n It’s the PROCESSING Sabheeta Academy of Computer Science & Information Technology, Hingorja

Processing Data Cache Output M. U Input Data Interface C. U A. L. U Registers bus Instructions decoder Instructions Cache F. P. U Registers 1. A. L. U= Arithmetic & Logical Unit 2. F. P. U= Floating Point Unit 3. C. U= Control Unit 4. M. U Memory Unit Sabheeta Academy of Computer Science & Information Technology, Hingorja

Types of Computer n n n Analog Digital Hybrid Sabheeta Academy of Computer Science & Information Technology, Hingorja

Analog Computer n An analog computer is a form of computer that uses the continuously-changeable aspects of physical phenomena such as electrical, mechanical or hydraulic quantities to model the problem being solved. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Digital Computers n A computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Hybrid Computers n Hybrid computers are computers that contain features of analog computers and digital computers. The digital component normally serves as the controller and provides logical operations, while the analog component normally serves as a solver of differential equations. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Classification of Computers According to their Size n Super Computer Mainframe Computer Mini/Server Computers Micro Computers n 1. Personal Computer 2. Workstation Computer n n n Portable Computers 1. Laptop 2. Wearable 3. Palmtop OR PDA Sabheeta Academy of Computer Science & Information Technology, Hingorja

Super Computer Sabheeta Academy of Computer Science & Information Technology, Hingorja

n Supercomputers are very fast in speed & are used for highly calculation tasks such as problems involving quantum physics, weather forecasting, climate research, molecular modeling (computing the structures and properties of chemical compounds, biological macromolecules and research into Nuclear weapons. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Mainframe Computers Sabheeta Academy of Computer Science & Information Technology, Hingorja

Mainframe Computer n n n Mainframe Computers are multi-user & powerful computers used mainly by large organizations for critical applications, huge data processing. such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing. It works continuously and mostly used in Banking sector. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Mini/Server Computers Sabheeta Academy of Computer Science & Information Technology, Hingorja

Mini/Server Computers n n According to size it is in mid-range between Mainframe Computer and a personal Computer, it is used for web browsing and web hosting. It is also a multi user computer. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Personal computer Workstation Computer Personal computer (PC) Sabheeta Academy of Computer Science & Information Technology, Hingorja

Personal Computer n A personal computer is any generalpurpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is operated directly by an end-user. It is used in homes, offices, schools, hospitals for documentation and mailing purpose. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Workstation Computer n workstations had offered higher performance than desktop computers, especially with respect to CPU and graphics, memory capacity and multitasking capability. They are optimized for the processing of different types of complex data such as 3 D mechanical design, engineering simulation, animation and image processing. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Portable Computers n Laptop n PDA/Palmtop n Wearable Sabheeta Academy of Computer Science & Information Technology, Hingorja

Laptop Computers n n It is a small & portable computer involves the same features of a Personal Computer, but it is not a power hungry so it can be operated on rechargeable batteries. It include a display, a keyboard, a pointing device (a touchpad) and speakers into a single unit. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Personal digital Assistant n A personal digital assistant (PDA), also known as a palmtop computer, or personal data assistant, is a mobile device that functions as a personal information manager, it used to record a frequently repetitive data. Current PDAs often have the ability to connect to the Internet. Many PDAs employ touch screen technology. Sabheeta Academy of Computer Science & Information Technology, Hingorja

Wearable Computer n Wearable computers are digital devices that are worn on the body. This type of wearable technology has been used in behavioral modeling, health monitoring systems and information technologies. Sabheeta Academy of Computer Science & Information Technology, Hingorja