Question:

(a) Provide types of computer systems and briefly describe each one.

(b) With the help of example, explain the difference between open source software, freeware and shareware.

(c) Nowadays many people, whether at home or in business, make use of applications software to facilitate their lives. Describe two
productivity software and for each one, define its purpose.

(d) A port is a connecting socket on the outside of the system unit. Differentiate between the serial port and parallel port, give examples
for their uses.