The program called "Elk Cloner" is credited with being the first computer virus to appear "in the wild" — that is, outside the single computer or lab where it was created. Written in 1982 by Richard Skrenta, it attached itself to the Apple DOS 3.3 operating system and spread by floppy disk. This virus was originally a joke, created by the high school student and put onto a game. The disk could only be used 49 times. The game was set to play, but release the virus on the 50th time of starting the game. Only this time, instead of playing the game, it would change to a blank screen that read a poem about the virus named Elk Cloner. The poem that showed up on the screen is as follows: 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 computer would then be infected. Skrenta describes the virus as "It was a practical joke combined with a hack. A wonderful hack." Remember, he was a 9th grader when he did this."