A
- Al-Jazari (1136–1206) - Polymath, numerous mechanical innovations
- Archimedes (c. 287-212 BC) - Polymath, inventor of the screw pump
- Richard Arkwright (1733–1792) - Credited for inventing the spinning frame but most notable for contributions to the modern factory system
- William George Armstrong, 1st Baron Armstrong (1810–1900) - Hydraulic power pioneer, founder of Armstrong Whitworth
Read more about this topic: List Of Mechanical Engineers