TARGET in the AREA tag.
The IETF Internet-Draft of Client-Side Image Maps defines an area tag. This tag describes a shaped area in a client-side image map, and provides the link that should be followed when the user clicks there. Adding the TARGET attribute to the area tag forces the load of that link into the targeted window. Example:

TARGET in the FORM tag.
The form tag normally displays the results of a form submission in the same window the form was submitted from. By adding the TARGET attribute to the form tag, the result of the form submission is instead loaded into the targeted window. Example: