Stac Electronics
| Formerly | 
 | 
|---|---|
| Company type | Public | 
| Industry | Computer software | 
| Founded | 1983 as State of the Art Consulting in Pasadena, California, United States | 
| Founder | Gary Clow, Doug Whiting, John Tanner, Mike Schuster, William Dally, Scott Karns, Robert Monsour, Robert Johnson, Hugh Ness | 
| Fate | Dissolved in 2002 | 
| Headquarters | , United States | 
| Products | Stacker disk compression utility | 
Stac Electronics, originally incorporated as State of the Art Consulting and later shortened to Stac, Inc., was a technology company founded in 1983. It is known primarily for its Lempel–Ziv–Stac lossless compression algorithm and Stacker disk compression utility for compressing data for storage.