This category is for programs and code that run under the DOS Operating system.

“Stoned is a large family of boot sector viruses dating from early in 1988. Prominent members of...

Stoned

“Pingpong is an early boot sector virus from March of 1988. Pingpong is introduced to a system...

Pingpong

Denzuko

“The Brain virus is considered the first PC virus. It infects 360 kilobyte, 5.25 inch floppy...

Brain

“Lehigh is an early DOS virus that infects only COMMAND.COM. While it is a file virus, the fact...

Lehigh

“Ply is a rare example of a non-encrypted polymorphic virus. It is the first of its kind, and...

Ply

“The Chameleon virus is the first polymorphic virus. Its basic functions were based mostly on...

Chameleon

“Eddie is a virus from Bulgaria created by Dark Avenger. It was Dark Avenger's first virus and...

Eddie