Substance Abuse Professional, a specific qualifications needed by drug/alcohol counselors in order to perform drug assessments on individuals tested under the U.S. Federal DOT (United States Department of Transportation) guidelines
Superabsorbent polymer, a polymer able to absorb tens or hundreds of times its own weight in water
South African Police, the national law enforcement organisation of South Africa between 1913 and the late 1990s
Shrimp Alkaline Phosphatase, a common alkaline phosphatase from a species of arctic shrimp
In computing and technology:
SAP AG, a global software company headquartered in Walldorf, Germany or its various products.