The new 80386 machines from Compaq Computer that shoot the company up into the rarefied Domain of Apollo & Co, presents a serious headache for IBM: does it respond by saying right, Compaq, we’ll get you, and soup up the top end of the Personal System/2 line to compete head-to-head, thereby killing the RT Personal stone dead, or does it plough on with the RT – or 6150, which is holding its own in Europe but looks dead in the water in the US market?