- Acceleration
- Access to Information Act
- Accommodation
- Accordion
- Accounting
- Acheson Gosford Irvine
- Achille Fortier
- Acid Rain
- Acoustics
- Acoustics Research in Canada
- ACREQ
- Act (Statute)
- Act of the Heart
- Act of Union
- Act of Union
- Act of Union
- Action démocratique du Québec (ADQ)
- Action libérale nationale
- Active Citizenship
- Active Citizenship (Plain-Language Summary)
