"Keyboard In The Noise" wrote:
You are correct at one time the Y suffix was for schools colleges and
universities -- some are still extant today

Virtually every Y call in my 1934 Callbook is a school. But they got away from
that by the 1947 Callbook where the vast majority is not.

See Stanford ARC W6YX (1922) is Stanford,

In 1934 W6YX is listed as "same QRA as W6FBU". W6FBU is listed to James M Sharp
Jr. at Stanford Eng. W6FBU then also lists W6DMY. W6DMY lists the home address
of Sharp, apparently the Stanford station trustee. Probably more than you wanted
to know, but I found it interesting...