- variable coordinate
- variable cross-section charge
- Variable Crystal Filter
- variable cycle engine
- variable cycle engine turbine
- variable DB white dwarfs
- variable density liquid method
- variable-density sound track
- variable design
- variable-directions method
- variable displacement
- variable domain
- variable endpoint
- variable-free expression
- variable frequency AC electrical power generating system
- variable-frequency Motor
- variable-gain amplifier
- variable gene
- variable-geometry turbine stator
- Variable Geometry Turbocharge and Exhaust Gas Re-circulation Control
- variable geometry turbocharger
- variable gradient method
- variable-grid method
- variable index
- variable inductance