- Auto Focus Lock
- autoformer
- autoformer regulator
- autofrettage
- autogamy
- auto-generating test paper
- autogenerator
- autogenesis
- autogenic relaxation
- autogenic succession
- autogenous grindability work index
- autogenous grinding process
- autogenous mill
- autogonal projection
- autograph
- autographic arts
- autographic record
- autogravure
- autoguidance system for agricultural machine
- autoguider
- auto-guiding system
- autogyration
- autogyro
- autohesion
- autoheteroploid