Viruses
	Worms
	Trojan Horses
	Zoo Virus/In The Wild
	Hoaxes
	Hackers
	Back Doors
	Executable Files
	.COM Files
	.VBS Files

A feature built into a computer program that gives special access or privileges. Programmers sometimes build back doors so they can fix unforeseen bugs in programs. Hackers can seize upon them for malicious purposes.