Digital Electronics
Digital computers are more widely used as compared to analog computers, because they are

Useful over wider ranges of problem types
Easier to maintain
Always more accurate and faster
Less expensive

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Digital Electronics
In case of OR gate, no matter what the number of inputs, a

0 any input causes the output to be at logic 0
1 at any input causes the output to be at logic 0
0 at any input causes the output to be at logic 1.
1 at any input causes the output to be at logic 1

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