Computer under attack
          Three kinds of computer virus causing damage for any users. First of all, a Trojan Horse. It is created for stealing a code of credit card or book bank. Spyware, in addition, is the computer virus that is created for saving data of the owner. Finally, Spam. It is used for cheating and obtaining money from people. (Philpot, 2011: 47)

Reference:
Philpot, S. (2011).Academic Skills. Oxford : Spain.