@earl
You're right. I got my start in the late 70's while finishing my degree.
They didn't wheel in the first CRT there until '78. It was probably that
they didn't have the money for them (or the machines to connect them to
or the system programmers to make the machines work) until then. I
remember not long after seeing that one, maybe 2 or 3 years, that
someone came out with an amber one instead of green...we all wanted one!
Just to check my history, I did a quick google and found some terminals
with monochrome displays, I assume CRTs, from 1969.