I'm flattered.These are all lecture notes, usually hastily written and incomplete, for lectures I've given in student and informal seminars.
I imagine that they would be obscure and that few would ever notice them. But it seems that Google has. These notes are the first Google hit for queries such as "Tate's thesis", "Modular form Fourier coefficients", and the like. I'm in second place for "Chebotarev density" (behind the Wikipedia article). Searching for "On modular forms of half integral weight" puts me two spaces above Shimura.
Wow. I guess Stanford treated you well, Larry and Sergey. Thanks!