Time Inc. Tuesday announced it has invested in Open Market, a Cambridge, Mass.-based software developer of business solutions for the Internet which has provided commercial transaction facilities for Time Inc.'s Pathfinder Web site
. Bruce Judson, general manager of Time Inc. New Media, will sit on Open Market's board of directors. Other Open Market clients include Tribune Co.
, Advance Publications, Conde Nast Publications, Banc One and First Union Corp.