Apple Computer Inc president and head of Apple USA Allan Zoren has resigned, to be succeeded by Michael Spindler, previously president, Apple Europe: Spindler gets the new title of chief operating officer and executive vice-president in charge of Apple USA, Apple Pacific, Apple Europe, Worldwide Product Marketing and Worldwide Manufacturing, reporting directly to chairman and chief executive John Sculley; Apple Europe expects to announce a replacement for Spindler shortly and until a replacement for Loren is hired, Spindler will be the acting president of Apple USA too; Apple is understood to have been unhappy at the company’s relatively poor perforamnce in the US market.