Primordial virus

Elk Cloner:  The program with a personality

        It will get on all your disks
          It will infiltrate your chips
            Yes it's Cloner!

        It will stick to you like glue
          It will modify ram too
            Send in the Cloner!

--The message displayed on screen by computers infected with Elk Cloner, one of the first computer viruses. Created in the early 1980's by a high school student, this program spread on Apple computers through floppy disks, and little could be done about it because anti-virus software hadn't been developed yet.