Ist Chapter 2

2. The main processing component that executes instructions and performs calculations.
6. Temporary memory that stores programs and data currently being used by the CPU.
8. The activity of transforming input data into meaningful information.
10. The stage where data and instructions are entered into a computer system.
11. An output device that produces a physical copy of digital information.
13. The protective enclosure that houses a computer’s internal components.
16. The CPU-cycle stage where the required operation is performed.
17. Output devices that convert digital audio signals into sound.
19. A display that allows users to provide input by touching the screen.
21. A component that converts wall-socket AC electricity into DC power for computer parts.
23. An input device that converts printed documents or photographs into digital files.
24. A storage device that uses rotating magnetic platters to store data.
27. An input device that converts sound into digital audio data.
28. The main circuit board that connects the CPU, memory, storage, and expansion devices.

1. The physical and electronic components of a computer that can be seen and touched.
2. Remote storage accessed through the internet instead of being stored locally.
3. The person who operates a computer system and provides commands or data.
4. The unit commonly used to measure the processing speed of a CPU.
5. A portable storage device commonly used to transfer files between computers.
7. A pointing device used to control the cursor and select objects on a screen.
8. An external connection point used to attach peripherals to a computer.
9. The primary output device used to display text, images, videos, and interfaces.
12. Non-volatile memory that stores essential instructions required during computer startup.
14. A set of programs and instructions that tells computer hardware what to do.
15. The first stage of the CPU cycle where an instruction is retrieved from memory.
18. The information or results produced by a computer after processing.
20. A type of memory that loses its stored data when the power is switched off.
22. A fast storage device that uses flash memory and has no moving parts.
25. The CPU-cycle stage where an instruction is interpreted before execution.
26. An input device used to enter letters, numbers, symbols, and commands.