The group's principal activity is to develop and license rights management and copy protection technologies. the group operates in three segments: video copy protection, consumer software copy protection and electronic license management ('elm') software. video copy protection segment licenses its technologies for videocassette, dvd and digital pay-per-view applications. consumer software copy protection segment licenses copy protection and digital rights management technologies in the pc multimedia software market. elm segment licenses elm solutions for enterprise applications to independent software vendors and asset management tools for end user customers. the group's customers include film studios, enterprise and consumer software vendors, digital set-top box manufacturers and digital pay-per-view network operators. video copy protection accounted for 63% of 2001 revenues; Electronic license management, 26%; Consumer software copy protection, 10% and other, 1%.