- hog box
- hold time
- hollerith code
- holographic storage
- holographic image
- holographic scanner
- homoclitic
- homoeomorphism
- homogeneous equation
- homogeneous grouping
- homogeneous space
- homographic solution
- homologous to
- homology
- homology sequence
- homomorphy
- homophony
- homothetic curves
- homotopic path
- homotopy group
- horizontal plane
- horizontal stress
- horosphere
- host node
- host system
- hot standby
- hot swap
- holonomocity
- home loop
- homeorphic spaces
- homoeomorphic spaces
- homogeneous coordinates
- homogeneous deformation
- homogeneous element
- homogeneous group
- homogeneous invariant
- homogeneous network
- homogeneous process
- homogeneous relation
- homogeneous strain
- homogeneous transformation
- homogenous homomorphism
- homogenous process
- homographic
- homological
- homology group
- homology theory
- homomorphic function
- homomorphism into
- homothetic conics
- homothetic figures
- homothetic triangle
- homotophic homomorphism
- homotopic paths
- homotopy boundary
- homotopy sequence
- homotopy type
- honeycomb memory
- hooped reinforcement
- horizontal axis
- horizontal parity
- horizontal pitch
- horizontal tabulation
- horizontal writing
- Horn clause
- hose connection
- host adapter
- holomorph
- holonomy group
- home address
- home position
- homogeneous multiplexing
- homogeneous polynomial
- homographic correspondence
- homogroup
- homological algebra
- homology dimension
- homothetic transformation
- homotopic
- homotopy
- homotopy property
- hopper window
- horizontal blanking
- horizontal circle
- horizontal ring
- horocycle
- host association
- host drive
- host language
- host name
- hosting service
- hot key
- hot plugging
- HotJava
- hotlist
- hourly data
- house cable
- housekeeping
- housekeeping procedure
- housekeeping routine