1. The document defines a computer as an electronic device that accepts data as input, processes the data according to stored instructions, produces output, and can store information for future use.
2. It lists the key characteristics of Abubakir Muhammed's computer as its speed, large storage capacity, ability to work continuously without tiring, accuracy if the data and programs are reliable, and versatility in performing different types of work simultaneously.
3. The document provides details on the functionalities of a computer as taking input, storing data and instructions in memory, processing data to generate useful information, producing output, and controlling all other functions.