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

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Q.	The trend in computer systems is towards the use of graphical user interfaces (GUIs). In these operating 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D.	an outdated input device.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» A. a roller ball which moves the cursor.

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