An articulator is a mechanical device which represents the temporo mandibular joint and jaw members to which maxillary and mandibular casts may be attached to stimulate jaw movements
Classification :
1. Based on theories of occlusion

Bon-will theory articulator
Conical theory articulator
Spherical theory articulator

2. Based on type of record used for their adjustments

Inter occlusal record adjustment
Graph record adjustment

3. Based on ability [...]