Being an engineering student you might have seen different electronics devices and inside those devices some type of boards, but specifically called PCBs (Printed Circuit Board).
Yes you got it right, the items which see on that board are electronic components. There are components like resistors, capacitors, diodes, transistors, inductors, transformers, ICs etc. and some mechanical items.
So for better understanding of all these components these can be divided in different types i.e. Active and Passive components (majorly).
So we classified them as Active and Passive components.