Abstract: Provided is a novel additive composition containing (a) a compound having, in the molecule, a group of a general formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each represent a hydrogen atom or a methyl group, but at least one of R.sup.2 and R.sup.3 is a hydrogen atom,and (b) an extreme-pressure improver containing sulfur and/or phosphorus, and optionally, as an additional component (c), an extreme-pressure improver containing neither sulfur nor phosphorus. Lubricating oil compositions comprising the additive composition have high load carrying capacity, and are effectively used as metal working oils and hydraulic oils, such as forging oil, pressing oil, drawing oil, rolling oil, cutting oil, grinding oil, etc.

Abstract: An apparatus and a method of screen display whereby either a plurality of screens or a plurality of windows on a single screen are displayed. On at least one screen or in at least one window, areas representing either the other screens or the other windows are displayed. When a pointer pointing to a given position either on that one screen or in that one window is used to select any one of these areas therein, the pointer is made to appear either on another screen or in another window corresponding to the selected area.