- objective coordination
- objective function
- object of higher type
- object-oriented analysis
- object-oriented database system
- object-oriented design
- object-oriented language
- object-oriented programming
- oblique angle
- oblique angled spherical triangle
- oblique bend of beam
- oblique circular cone
- oblique circular cone
- oblique circular cylinder
- oblique circular cylindrical surface
- oblique cone
- oblique coordinates
- oblique coordinates in plane
- oblique cylinder
- oblique cylindrical helicoid
- oblique derivative boundary condition
- oblique derivative problem
- oblique dihedral angle
- oblique factor model
- oblique helicoid