The trend in computer systems is towards the use of graphical user interfaces (GUIs). In theseoperating systems, a track ball is described as

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a pen-shaped device which allows data to be entered through the CRT screen.

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a roller ball which moves the cursor.

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a figure which resembles a familiar office device.

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an outdated input device.

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None of these

1.	The trend in computer systems is towards the use of graphical user interfaces (GUIs). In theseoperating systems, a track ball is described as
A.	a roller ball which moves the cursor.
B.	a pen-shaped device which allows data to be entered through the CRT screen.
C.	a figure which resembles a familiar office device.
D.	an outdated input device.
E.	None of these
Answer» B. a pen-shaped device which allows data to be entered through the CRT screen.

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