Text Book Notes

Text Book Notes - My Text Book Notes

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CITM 102 CH02 FUNDAMENTALS OF INFORMATION TECHNOLOGY Information Technology (IT) BENEFITS 1. Make communications through cell phone/ instant txt messaging/ etc. possible 2. Enables transactions between an individual and the organizations (permits a person to obtain, organize, analyze, and store data and information through on-line searches and specific software tools) 3. Provide entertainments (Ex: MP3) General: It helps do things with greater efficiency COMPONENTS IT is limited to the following capabilities: 1. Accepting and storing information 2. Performing mathematical calculations 3. Applying logic to make decisions 4. Retrieving, displaying, and sending information 5. Consistently repeating the above actions many times IT devices combine these capabilities in a number of ways to help us more efficiently and effectively work with information. Example: You plan to go on vacation to Thailand. You are looking for a book with tourist information. You decide to search and buy one on Amazon.ca. Describe the process of the online search, selection, and payment. The following are the core IT capabilities that come into play: Accepting Information Searching for an appropriate book online Retrieving & Displaying Information Amazon.ca shows you availability of books and provides information about them Storing and Sending Information Select a book and add it to your shopping cart Performing Mathematical Calculations (and storing again) At check out, view price including taxes. If more than one book, the total is calculated. Sending Information Purchasing - credit card is charged CATEGORIES 1. IT CATEGORY 1: HARDWARE The electronic and mechanical components that you can see and touch
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CITM 102 CH02 Hardware system components common among all IT devices: o HW Component: PROCESSING – directs execution of processes Processing Hardware o Transistor: electronic switch that can be on / off and that can represent data in binary format o Microprocessor: A tiny chip made up of transistors o CPU (central processing unit): Works together with memory to control the execution of all instructions and the processing of all data (referred to as the computer’s brain) o Clock Speed: A way to measure the CPU performance o HW Component: o HW Component: INPUT – provides interface used for data entry into a device Input Hardware/Devices o Keyboard Advantage: It is the most versatile and is capable of entering all types of data and instructions Disadvantage: repetitive motion can cause injuries o Barcode Reader o Pointing Device (ex. Mouse) Advantage: allow users to provide instructions to computer using physical movements o Mic o Scanning Device (ex. Scanner, Digital Camera) o Ipod o Touchscreen o CD Rom o Card Swiper Criteria to consider when choosing input devices: - Data format - Accuracy and quality - Compatibility - Portability - Speed - Environmental Limitations - Ergonomic Properties
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Text Book Notes - My Text Book Notes

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