Look up AACS in Wiktionary, the free dictionary.
AACS may refer to:
- Advanced Access Content System, a standard for content distribution and digital rights management
- American Association of Christian Schools, an organization that unifies individual Christian schools and statewide Christian school associations
- Annapolis Area Christian School, a Christian school in Maryland, United States
- Attitude and Articulation Control Subsystems, used to orient space probes relative to a fixed point