We are proud to present the TAMODIA 2006 proceedings. In 2006, the TA- MODIA workshop celebrated its ?fth anniversary. TAMODIA is an obscure acronym that stands for TAsk MOdels and DIAgrams for user interface - sign. The ?rst edition of TAMODIA was organized in Bucharest (Romania) by Costin Pribeanu and Jean Vanderdonckt. The fact that ?ve years later the TAMODIAseriesofworkshopsstillcontinuessuccessfullyprovestheimportance of this research area for the human computer interaction community The ?rst workshopaimed at examining how multiple forms of task expressionscan sign- icantly increase or...