No damage of any kind is done to the computer or its files.

When a directory listing is requested, SNAFU will print a forgery listing both real and phony files. Listed also will be the actual volume name and a mangled version of the actual path. As a decorative touch, the listing will be tastefully sprinkled with smiley-faces and other garbage characters. (Don't neglect to try out, too, the "cd" command.)

After acting out-of-line for five or six commands (not counting DIR, which *always* prints a directory listing; and not counting the press of alone, which always reprints the prompt), the computer will resume normal operation. Sign: look for "Returning to DOS prompt. . . ."--that's the last phony message. After accepting and ignoring one more command (other than DIR or, possibly, CD), the computer will quietly return to normal (and to DOS). If you choose, SNAFU will leave behind a "readme" file explaining what had happened.