malware, program designed to damage a computer system, worm, self replicating software to delete, corrupt or modify files, trojan, hidden program that appears useful but isnt, ransomware, a program that wants money to retrieve encrypted files, phishing, social engineering to get people to supply credentials from a fake email, dos, infecting a computer to flood a server, ddos, infecting many computers to flood a server, vulnerability, weakness or flaw , utility, maintain and upkeeps computer system, operating, controls and manages hardware in a computer.

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