Computers under Attack

Virus can be classified into three kinds: a Trojan Horse, Spyware and Spam. Frist of all, Trojan Horse. It is created to obtain credit card or bank passwords. Second, Spyware. It collects data of the computer’s owner. Finally, Spam. It is used for deceiving people and obtaining cash  from them. (Philpos, 2011 : 47)

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