Quark Inc’s Quark XPress, the desktop publishing package which dominates the more advanced end of the Macintosh desk-top publishing market, was shown running on a personal computer under Microsoft Corp’s Windows 3 at the recent Business Computing Show in London. But it is unlikely to worry Aldus Corp, the developer of Pagemaker, too much: according to Publishing Magazine, the MS-DOS version is likely to stick at the high end, with Quark likely to recommend an 80486-based machine with 8Mb RAM, or at minimum an 80386 with 3Mb. Aldus recommends a 4Mb 80386, but will run on an 80286 with 2Mb. XPress/PC is due out next year – Unix versions for machines such as Sun Microsystems Inc workstati ons and the IBM Corp RS/6000 are also on the cards.