An electronic device, operating under the control of information, that can accept data, process the data, produce output and store the results for future use:

This is a standard textbook definition of a computer. A computer is an electronic device that accepts input (data), processes it according to stored instructions (software/programs), produces output, and stores results. Input is just the data entry process, software is the code itself, and hardware is the physical components - none of these fully capture the complete definition.