Computer is an electronic data processing machine / device;
which takes the inputs from users;
process the inputs;
stores the inputs;
and generates the desired / required output.
Computer is a machine which is working similar to humans as we see or hear i.e. taking the inputs;
we think on what we saw / heard;
And reply accordingly to the input via mouth i.e. output.
Computers are much better in speed, performance, accuracy, storages, etc. But they are servents of mankind untill we forcefully avoiding the AI(Artificial Intelligence) to computers and humanly feeling.
The day when we find machines which are mechanical but behaves like humans that will be beginning towards end of mankind.