He resigned his paid job, but was later brought back as unpaid (and maybe just honorary) staff. I'm not sure if he ever actually did anything for MIT in that un

He resigned his paid job, but was later brought back as unpaid (and maybe just honorary) staff. I'm not sure if he ever actually did anything for MIT in that unpaid role. I kind of suspect it was a gift to grant him an office and other MIT resources for his work on GNU. [GNU itself used to have some small lab space at MIT, for use by other volunteers.] But even so, he was listed in the MIT directory as a Visiting Scientist.