INPUT AND OUTPUT DEVICES In computing‚ input/output‚ or I/O‚ refers to the communication between an information processing system (such as a computer)‚ and the outside world possibly a human‚ or another information processing system. Inputs are the signals or data received by the system‚ and outputs are the signals or data sent from it. The term can also be used as part of an action; to "perform I/O" is to perform an input or output operation. I/O devices are used by a person (or other system) to
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Chapter 9 Input/Output Devices Contents: I. Introduction II. Input Devices a. Keyboard‚mouse‚joystick‚scanners‚digital camera‚ bar code reader‚ touch Sreeen‚Speech input device (microphone) III. Output Devices a. Monitor ‚ Speaker‚ Printers ( different types) ----------------------------------------------------------------------------------------I. Introduction The computer will be of no use unless it is able to communicate with the outside world. Input/Output devices are required for users to
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A THOROUGH OVERVIEW OF INPUT AND OUTPUT DEVICES PRESENTED BY THE MEMBERS OF GROUP B COMPUTER SCIENCE DPT. INTRODUCTION • The I/O devices as parts of the components of an information processing system or a computer system are those devices which enables the computer system to communicate with the outside world. As we all know from the concept of communications in English language that communication is said to have being completed only when the encoder (sender) must have received a feedback from
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Step 1: Develop a minimum of 5 goals you either have or would like to have. 1. I want to lose weight. 2. I want to open a home for the elderly. 3. I want to buy a new car. 4. I want to learn Spanish. 5. I want to graduate college with a 3.5 GPA or higher. Step 2: Re-write each of your established goals from Step 1 using the S.M.A.R.T. Goal format; (See the example in the Quick Reference Notes in the VIP2 Toolbox). 1. I want to lose weight. S= I want to lose 60 pounds
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Input devices There are many input formats which enable us to gather up and collect information‚ and enter data and instructions into the computer. Input devices can be manual or automatic. Manual input devices include: Keyboard - including concept keyboard. This is a flat board that contains a grid of buttons. Each button can be programmed to follow instructions. An overlay sheet is placed on the grid with an explanation for each button. They are used in primary schools with young children
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INPUT DEVICES: 1. Keyboard - The keyboard is a way to input letters or numbers into different applications or programs. A keyboard also has special keys that help operate the computer. 2. Mouse - The mouse is used to open and close files‚ navigate web sites‚ and click on a lot of commands (to tell the computer what to do) when using different applications. 3. Touch Screen - A touch screen is a computer screen or other screen that you can touch with your finger to enter information. Examples
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Unit 2 Assignment 1: Homework Learning Objectives and Outcomes Determine program input‚ processing‚ and output stages. Create the necessary flowcharts to describe a program’s structure. Use pseudocode to define a program’s structure. Formulate solution algorithms for calculations by properly following the order of operations. Assignment Requirements Answer: Short Answer 1‚ 2‚ 3‚ and 4 on page 71 Algorithm Workbench Review Questions 1 and 2 on page 71 Programming Exercises Questions 1
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The Traditional Life Cycle Whatever methodology you selected‚ you would likely find four common threads - analysis‚ design‚ "programming"‚ and implementation. Programming here may be loosely interpreted to include packaged software and even outsourcing‚ which will be addressed shortly. It seems somewhat obvious that before you can create‚ improve‚ or replace an information system‚ you should stop to study the current system‚ whatever it might be‚ to see how it operates. This is typically an
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INPUTS The main input of the UPS’s package tracking system is the scannable-bar coded label which is attached to a package. Customers can download and print their own labels using special software provided by UPS or by accessing the UPS website. This scannable label contains detailed information about the sender‚ the destination of the package‚ the recipient‚ and when the package should arrive. PROCESSING Before the package is even picked up‚ the data from the scannable bar coded label is
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INPUT/OUTPUT ORGANIZATION • Accessing I/O Devices • I/O interface • Input/output mechanism Memory-mapped I/O y pp / Programmed I/O Interrupts Direct Memory Access • Buses Synchronous Bus Asynchronous Bus I/O in CO and O/S • • • Programmed I/O Interrupts DMA (Direct memory Access) A bus is a shared communication link‚ which uses one ‚ set of wires to connect multiple subsystems. The two major advantages of the bus organization are versatility and low cost. Accessing I/O Devices
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