16 ◾ Computational Thinking for the Modern Problem Solver
the four essential parts of a computer. Every modern computer must have
at least one of each of the following:
1. Input device
2. Output device
3. Memory
4. Processor
An input device, as its names implies, provides a way to get data into
the computer. e input device shown in Figure1.12 is a keyboard. Other
kinds of input devices include computer mice, track pads, and micro-
phones. Smartphones and tablet computers use the surface of the LCD as
an input device.
Output devices provide ways for the computer to share the results of
its computation with the user. On personal computers the most common
output device is the computer display. Other output devices include print-
ers and spea ...