W0YI is considered a 1x2 call

You are correct at one time the Y suffix was for schools colleges and
universities -- some are still extant today

See Stanford ARC W6YX (1922) is Stanford,

W9YB (1920) is Purdue

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Keyboard In The Noise

HAH! Look up the history of channel 5, Ames Ia. Early on, Iowa State
University used W0YI, for their television station, which _is_ the
callsign
for the amateur radio facility there. The eventual commercial callsign
WOI
is a direct derivative of that amateur radio callsign.