Accepted to the 7 th International Workshop on Organisational Semiotics, Setúbal, Portugal, July, 2004 User Interfaces as Organisational Action Media Göran Goldkuhl 1,2 , Stefan Cronholm 1 , Jonas Sjöström 2 1 Department of Computer and Information Science, Linköping University, SE-581 83 Linköping, Sweden ggo@ida.liu.se , scr@ida.liu.se 2 Jönköping International Business School, P.O. Box 1026, SE-551 11 Jönköping, Sweden jonas.sjostrom@ihh.hj.se Abstract The issue at stake is how to conceive user interfaces of IT artefacts in an organ- isational and semiotic perspective. Different communicative functions of user interfaces are investigated and the sequencing of user-system interaction. Two earlier models in the information systems actability approach are investigated and integrated: The Elementary InterAction Loop (EIAL) and the communica- tive model of user interfaces. Three new EIAL models are created dependent on three interaction modes (reading, formulation and navigation mode). A small example from eldercare is used for illustration. The foundations of the different interaction models in socio-instrumental pragmatism are discussed. 1