Jigsaw connector pieces representing tasks to be performed are displayed on a computer screen, preferably hierarchically in a tree, to elucidate the relationships between tasks. To perform a task, a user positions an attachment jigsaw piece next to its corresponding connector piece. The user is then...http://www.google.de/patents/US6892361?utm_source=gb-gplus-sharePatent US6892361 - Task composition method for computer applications
