- Introduction to the Science of Sociology
- Introduction to the Society for the Study of National Strengthening
- Introduction to the Study of History
- Introduction to“the Class Struggles in France 1848-1850”by Karl Marx
- introductory class
- Introductory Lectures on Psychoanalysis
- Introductory to Library Science
- introflexion
- introgression
- introgression hybridization
- intromit
- intromittent
- intron
- introrse anther
- introscope
- introspection
- introspective method
- introversive intuition epistemology
- introverted generation
- intruder state
- Intrusion
- intrusion
- intrusion and hold-up alarm system
- intrusion detection system
- intrusion detection systems