If your web browser formats this page incorrectly, try viewing the page source. In netscape 4, click the view menu, then click page source. Programs running in the background are not supposed to generate output or require input. If a program in the background writes to standard error, it will be displayed, but it will probably mess up the display of the program running in the foreground. If a program running in the background tries to read from standard input, it will be stopped until you put it into the foreground.