Erwise is a discontinued pioneering web browser, and the first commonly available with a graphical user interface. Released in April 1992, the browser was written for Unix computers running X and used the W3 common access library. Erwise was the combined master's project of four Finnish students at the Helsinki University of Technology (now merged into Aalto University): Kim Nyberg, Teemu Rantanen, Kati Suominen and Kari Sydänmaanlakka. The group decided to make a web browser at the suggestion of Robert Cailliau, who was visiting the university, and were supervised by Ari Lemmke.