i
- IDSL
- IMAP
- IMD
- Imitation
- impedance
- Imperfect authentic cadence (lac)
- Impressionism
- inches per second
- Incipit
- Indeterminacy
- Indie
- inductance
- Insert
- insertion loss
- Intellectual property
- interactive media
- interfield frames
- interlace
- intermodulation distortion
- Internal cadence
- International phonetic system
- Internet
- Internet address
- Internet country code
- Internet Message Access Protocol
- Internet Protocol
- Interval
- Interval class (IC)
- Interval class vector
- Interval number
- Intonation
- Introduction (intro)
- Invariance
- Invariant subset
- Invention
- inverse square law
- Inversion form
- Inverted interval
- Invertible counterpoint
- IP
- IP address
- ips
- ISDN digital subsriber line
- Isorhythm
- Italian augmented sixth (It+6)