Digital Literacy and Information Technology Fundamentals
Core ideas
Digital literacy means knowing what a computer can and cannot do, how data differs from information, and how the main hardware and software categories fit together. Key concepts: data vs. information (information = processed, meaningful data), information processes (collection, storage, processing, transmission), properties of information (objectivity, reliability, completeness, relevance, value), and the main device classes (input, output, storage, processing).
Traps to watch
- Confusing a property of information with a device feature. "Completeness" describes information, not a hard drive.
- Treating data and information as synonyms: raw numbers are data; only when interpreted do they become information.
- Mixing up input and output devices: a touchscreen is both, a scanner is input only, a plotter is output only.
- Overlooking that the same data can yield different information depending on context (a list of temperatures means nothing until you know what is being measured).
Rule of thumb
Ask three questions about any example: Where does it come from? What transforms it? Where does it go? This maps any scenario onto input → processing → output and usually eliminates the wrong options.
Worked example
"A sensor records 200 room temperatures. A program computes the average and displays it." The 200 numbers are data; the average is information; the sensor is an input device; the display is output. Any answer calling the average "data" is wrong because it has already been processed.