In education:
* Women's Army Corps: A branch of the United States Army from 1942 to 1978.
* Washington Athletic Club: A private athletic club in Seattle, Washington.
In business:
* Wireless Application Certificate: A certificate that verifies the compatibility of a wireless device with a network.
* Wholesale Agreement Contract: A contract between a manufacturer and a distributor.
* World Association of Chefs: A professional organization for chefs.
In other areas:
* War Artists' Advisory Committee: A committee that oversaw the work of artists during World War II.
* Western Athletic Conference: A collegiate athletic conference in the United States.
* Word-A-Day Challenge: A daily word game.
To know the specific meaning of WAC, you need to consider the context in which it is used. For example, if you see WAC in a document about the military, it likely refers to the Women's Army Corps.