Xoris polla logia pame apeyhtias sto thema: merika logika ta kserete idi, alla iparxoun orismoi kai diaxorismoi. 1) Viruses: To VIRUS einai executable arxeio pou pollaplasiazetai kai metaferetai. O tipos virus DEN mporei na drasei apo monos tou, alla mono an to kanei kapios run. Diadidetai mono otan tou kanete diplo click. Iparxoun 3 idi:
a) Boot sector viruses: Viruses pou molinoun to sistima kai diadidontai otan to sistima ksekinaei.
b) E-mail viruses: Oi ioi pou diadidontai mesa apo email kai attachments
c) Macro viruses: Oi ioi pou diadidontai mesa apo makroentoles- programatistikes odigies pou kanoun aytomata tasks
2)Worms: Programma pou MPOREI na drasei apo mono tou. Ta WORMS sindeontai pio poli me tin mnimi para me ton disko , kai skopos tous einai na ton gemisoun. Ta worms den einai katastrofika. Afairountai aplos kleinontas to molismeno arxeio.
3) Trojan horses: Katastrofika arxeia pou pernoun morfi allou arxeiou gia na mpoun sto sistima sas (hehehe) 
4) Logic bombs kai time bombs: Ta logic bombs einai oi ioi pou energopoiountai afou proigithoun sigekrimenes entoles (activate virys X when program Y runs). Ta Time bombs energopoiountai sigekrimeni imerominia (ig progtam runs after date Y do destructive action.
5) Spyware: Enas tipos parakolouthiktikou programmatos me skopo na parei data, na apothikeysei kai na analisei ilektronikes diadoseis tou sistimatos. Den einai katastrofiko programma, alla mporei na parakolouthisei tin kathe sou kinisi. Pouthena den eisai asfalis.... An kai ayto mporei na xrisimopoiithei gia asfaleia. 
Na kserete pali pos ola ayta den einai copy paste apo to internet, alla ta egrapsa monos mou kai apaitouse ora. OTI MATHAINETE KALO EINAI, TORA KSERETE KAI ORISMOSU POU MPOREI NA SAS FANOUN XRISIMOI. 
Iposimeiosi:
Cf. Stamatellos (2005), Computer ethics: A global perspective, World Headquarters.
