one- - orig
- one-dimensional classification
- one-factor classification
- one-sided communication
- one-step inference
- one-to-one correspondence
- one-way classification
- one-way communication
- one-year course
- one-year forecast
- Onondaga Academy of Sciences
- ontogenetic learning
- ontological analysis
- ontological analyticity
- ontological approach
- ontological argument
- ontological assertion
- ontological category
- ontological classification
- ontological concept
- ontological conception
- ontological determinism
- ontological dichotomy
- ontological implication
- ontological induction
- ontological interpretation
- ontological mechanism
- ontological principle
- ontological problem
- ontological relation
- ontological relationship
- ontological relativity
- ontological system
- ontological thesis
- ontologization
- ontology
- ontology of science
- open entry
- open model
- open problem
- open scholarship
