Well that was the starting name, but evolved to the PAC from Pacific Athletic Conference, so it’s not really different from the ACC or SEC in that regard. Picking nits here of course.
“
Oregon and
Oregon State joined in the summer of
1964.
[75][76][77] With their addition, the conference was known unofficially as the
Pacific Athletic Conference,
[78][79][80][81][82] and then the
Pacific-8 (as there already was a major conference called the
Big Eight). In
1968, the AAWU formally renamed itself the
Pacific-8 Conference, or
Pac-8 for short. The Pac-8 did not allow a second
bowl team from the conference until the
1975 season;
[83] in basketball, participation in the
National Invitation Tournament (NIT) was not allowed until
1973.
[84]”