I didn't know, either, so I looked it up so you don't have to. MITOCW: MIT OpenCourseWare https://en.wikipedia.org/wiki/MIT_OpenCourseWare https://en.wikipedi

I didn't know, either, so I looked it up so you don't have to. MITOCW: MIT OpenCourseWare https://en.wikipedia.org/wiki/MIT_OpenCourseWare https://en.wikipedia.org/wiki/MIT_OpenCourseWare https://ocw.mit.edu/index.htm https://ocw.mit.edu/index.htm