LOCAL (relative addressing)

EXTERNAL (absolute addressing)

EMAIL (opens an email application)

ANCHOR (goes to a named place on the page)

_blank (opens the page in a new, separate window)

_self (opens the page in the same window; good for overriding a global command like <BASE TARGET=_blank>)

_parent (opens the page in the same window as the frameset)

_anyname (opens the page in a window named "anyname" if it exists, or a new window if it doesn't)