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Question

How did the first mouse prototype differ from modern versions?

a.

The first mouse prototype required a direct physical connection with the computer

b.

The first mouse prototype could obtain pure vertical or horizontal motion by tilting it so that only one wheel was in contact with the desk

c.

The first mouse prototype was digital, not analog

d.

The first mouse prototype was made entirely of plastic

Answer: (b).The first mouse prototype could obtain pure vertical or horizontal motion by tilting it so that only one wheel was in contact with the desk Explanation:The first mouse prototype, developed by Douglas C. Engelbart in 1964, used two wheels to transmit x–y coordinates to the computer. This design offered a few advantages over today’s versions, one being the ability to achieve pure vertical or horizontal motion by tilting the mouse so that only one wheel was in contact with the desk.

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Q. How did the first mouse prototype differ from modern versions?