Ernst Rothauser (7 July 1931 – 4 August 2015)[1][2] was an Austrian computer scientist.

As member of Heinz Zemanek's "Mailüfterl-Team", he worked on the country's first transistor computer.

After finishing his dissertation he was hired by IBM Zurich Research Laboratory, retiring in 1995.

[3][4] Rothauser worked on the Mailüfterl with Zemanek and a team of students.

[5][better source needed] In 1960, he finished his dissertation about the Vocoder at TU Wien.