Efficient user interface in electronic mail systems Akin Center.Carnegie Mellon UniversityDesign Research 1982 Traditionally, research in computer sciences has had its primary focus on developing models and systems to attain superior design and implementation capabilities. However, with new software becoming available at an ever increasing rate, there is a parallel increase in our need to better understand the mechanics of computer-user interfaces, whether they are of a motor, cognitive, or perceptual kind