| Acronym | Definition |
|---|
| KNAC➣Keck Northeast Astronomy Consortium (est. 1990) |
| KNAC➣Koninklijke Nederlandse Automobiel Club (Dutch: Royal Dutch Automobile Club; est. 1898) |
| KNAC➣Kraft North America Commercial (Northfield, IL) |
| KNAC➣Kenya National Assurance Company (insurance) |