SAP may refer to:

• Serum amyloid P component, the serum form of Amyloid P component
• Seminal acid phosphatase, an enzyme produced by the prostate
• Superabsorbent polymer, a polymer able to absorb tens or hundreds of times its own weight in water
• Shrimp Alkaline phosphatase, a common alkaline phosphatase from a species of arctic shrimp
• Strong anthropic principle, the idea proposing that the universe must produce life
• Self-avoiding polygon, a mathematical object of geometry

Sap is a fluid transported in xylem cells (vessel elements) or phloem sieve tube elements of a plant. These xylem cells transport water and nutrients throughout the plant.

In talks with countries that have expressed a wish to join the European Union, the EU typically concludes Association Agreements in exchange for commitments to political, economic, trade, or human rights reform in that country. In exchange, the country may be offered tariff-free access to some or all EU markets (industrial goods, agricultural products, etc.), and financial or technical assistance.