Dataindustrier AB or DIAB was a Swedish computer engineering and manufacturing firm, founded in 1970 by Lars Karlsson and active in the 1970s through 1990s. The company's first product was a board-based computer centered around a specific bus named Data Board 4680. This unit was used for automatic control in several Swedish industries as would be almost all of DIAB's computers. DIAB is mostly known for engineering the ABC 80, the first Swedish home computer, manufactured by Luxor AB.

They would subsequently develop all the ABC-models (ABC 800, ABC 1600 and ABC 9000) before rebranding their own make of the ABC 9000 as DIAB DS-90 and develop a series of Unix-compatible computers, using code licensed from AT&T Version 5 Unix release, but with a unique in-house kernel using the brand name DNIX. DIAB would continue to provide OEM services past Luxor AB, the most prominent probably being the entire Unix server product line from Cromemco.

The compiler technology developed by Tomas Evensen at DIAB was bought by Wind River Systems and was renamed to the "Wind River Compiler". Further information about the Wind River Compiler can be found at the Wind River Compiler product home page.