POWER DENSITY PORT OF EMBARKATION (POE) An authorized point where shipments leave a country, either from the continental United States or from a foreign country. POSITIONAL TOLERANCE A positional tolerance defines a zone within which the center, axis, or center plane of a feature of size is permitted to vary from true (theoretically exact) position. Basic dimensions establish the true position from specified datum features and between interrelated features. A positional tolerance is indicated by the position symbol, a tolerance, and appropriate datum references placed in a feature control frame. Previously known as true position. POSITION DESIGNATION User selection and entry of a position on a display, or of a displayed item. POSITIVE An artwork, artwork master, or production master in which the intended conductive pattern is opaque to light, and the areas intended to be free from conductive material are transparent. POSITIVE-ACTING RESIST A resist that is decomposed (soft- ened) by light and that, after exposure and development, is removed