The sequence .edu (short for educational) is in use in many countries as a second-level domain for academic institutions such as universities, colleges, and research institutes.
Still others do not maintain a second-level domain specifically for academic institutions.
In France, Germany, Switzerland, and the Netherlands, for example, each institution will have its own second-level domain (thus sorbonne.fr for the Sorbonne, hslu.ch for the Lucerne University of Applied Sciences and Arts and tum.de for the Technical University of Munich).
That changed with Agid's Order no.36 of February 12, 2018.
[1][2] In some countries, both .edu and .ac second-level domains exist, differentiating between different types of academic institutions.