To build a showU exercise, you need:

• A graphics tool, such as Adobe Photoshop or Paint Shop Pro, that can store GIF files with transparency
  You will use this tool to prepare the graphics and to locate the coordinates for setting up the adaptive feedback
• A plain-text editor, such as Notepad or SimpleText
  You will use this tool to prepare the data files which specify the graphics and the adaptive feedback and to edit HTML files

To run a showU exercise, you need:

• A Java-enabled web browser such as Microsoft Internet Explorer or Netscape Navigator
  The showU applet is embedded in an HTML page.  Just access the page to run the exercise.
• (optional) An Internet or intranet site to host the applet files and the web page in which the applet is embedded
  If the applet is on a network, it can be accessed by many people at once.  But the applet can also run on your personal computer.