- graceful degradation
- grading failure
- grading standards
- grain reversal
- Gravity model
- gray image
- grazing angle
- grid
- grazing incidence
- grenz ray
- grey balance
- grey level
- grid characteristic
- ground clutter
- ground conductivity
- ground constant
- ground crew
- ground index
- ground system
- group comparison
- growth rate
- guard area
- guidance output
- gun amplifier
- gyro drift
- gyro sensor
- gyroscopic stability
- grid line
- gross expenditures
- ground address
- ground loss
- ground network
- ground station
- group
- group mark
- group profile
- group separator
- guard band
- guard release
- guard time
- guide card
- guide edge
- guiding mechanism
- H-network
- half-path
- halt button
- Hamming coding
- grounding receptacle
- group alarm
- group heading
- group index
- group number
- group relation
- group velocity
- grown junction
- guard circuit
- guard space
- guidance instructions
- guided missile
- gun diode
- Gunn device
- gust loads
- gyro stabilization
- gyro-frequency
- half-tone
- halt acknowledge
- Hamitonian function
- Hamming distance
- handie-talkie
- handled traffic
- handler routine
- handset cord
- Hard currency
- hard decision
- hard limiter
- hard limiting
- hard pulse
- hardware engineering
- hardware representation
- harmful interference
- harmonic analysis
- harmonic analyzer
- harmonic configuration
- harmonic emission
- harmonic function
- harmonic generation
- harmonic measure
- harmonic multiples
- harmonic response
- Hartley oscillator
- half-line
- half-period
- half-pulse
- half-wavelength
- handset
- hanging indent
- hard vacuum
- hardware compatible
- hardware reset
- harmonic amplifier