- equiamplitude plane
- equiangular
- equiangular hyperbola
- equiangular polygon
- equiangular spiral
- equiangular triangle
- equianharmonic curve
- equianharmonic group
- equianharmonic points
- equianharmonic ratio
- equiareal metric
- equicenter
- equidistant surface
- equiform
- equiform geometry
- equiform group
- equiform transformation
- equifrequent
- equilateral
- equilateral cone
- equilateral hyperbola
- equilibrium brightness
- equilibrium point
- equilibrium slope
- equilong
- equimodal distributions
- equinoctial
- equipartition
- equiphase
- equiphase plane
- equiphase zone
- equipment breakdown
- equipment compatibility
- equipment fail
- equipment failure
- equipment rack
- equipoise
- equipollent
- equipotent
- equipotential bonding
- equipotential cathode
- equipotential layer
- equipotential line
- equiprobability curve
- equiprojection
- equiresidual
- equisignal line
- equisignal zone
- elliptic coordinates
- elliptic involution
- elliptic projectivity
- elliptical cylinder
- elliptical field
- eluding game
- email address
- embeddability
- embedded command
- embedded interface
- embedded mode
- embedded system
- embedding
- emboldening
- emergency mode
- emigration
- emission velocity
- emitter barrier
- emitter pulse
- empiric distribution
- employment schedule
- empty file
- empty medium
- empty statement
- enabled instruction
- enclose
- encoded format
- encryption key
- endless loop
- endless tape
- energy factor
- energy function
- energy impulse
- energy line
- energy unit
- enforced lock
- engaged signal
- engineering time
- enhanced mode
- enhancer
- enough
- enter inhibit
- enterprise mode
- entire network
- entity descriptor
- entity reference
- entity structure
- entry instruction
- entry point
- entry-status
- envelop
- envelope printer