lesson
Several parts can work together
1 · Learn
A computer system can include inputs, processing, outputs and stored data. In a model library system, a scanned book code is input, software finds its record, and a display shows its title and loan status.
A connected system may exchange data with other devices. Describe each part's job and the information exchanged, not only the brand of the device.
2 · Worked example
The scanner does not contain all the library's meaning by itself. The system uses the scanned identifier to locate the matching stored information.
3 · Your turn
In this library example, what is stored and what is displayed as output?
Check your answer
Stored book records; the title and loan status are displayed. Other stored fields may exist, but do not invent them as facts of the example.
4 · Apply your learning
Draw a model system for an invented classroom collection. Label the data passed between its parts.
Adult guidance and safety
Use adult-approved offline or school-managed tools, invented data and original media. Keep projects private unless sharing is explicitly approved. Paper traces support, but do not replace, practical programming and saved digital work. No real passwords or personal records belong in these exercises.
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