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_blank: It opens the link in a new window.

_self: It is the default value. It opens the linked document in the same frame.

_parent: It opens the linked document in the parent frameset.

_top: It opens the linked document in the full body of the window.

framename: It opens the linked document in the named frame.

<a href="pagina.html" target="_blank">abrir en una nueva ventana o pestaña</a>