There are many components and aspects of computers that you can study. For example: you can learn how to assemble a computer, how to repair a computer, how to implement security features, how to use various software applications, and how to use internet-based applications.
As modern technology grows and expands, so do the intricate workings of a computer. Computer studies is becoming the number one field to study. Fortunately, there are many different sub-fields within computer studies, which means that you are spoilt for choice. There is a vast variety of areas to specialise in within the computer field.