- lesson
- letter
- letter code
- Letter Justification
- letter shift
- letterhead paper
- level
- level checking
- level flight
- level identification
- level indicator
- level shifting
- level with
- lever brake
- lexical analyzer
- lexical convention
- lexical scope
- lexical unit
- lexicographical
- library
- library directory
- library list
- library macrodefimition
- library network
- library program
- library software
- library tape
- library text
- license to
- licensed material
- licensed publication
- life table
- LIFO principle
- lift component
- lifter layer
- lifting
- lifting arm
- lifting-tackle
- ligature
- light amplifier
- light bulb
- light button
- light gun
- light level
- light modulation
- light modulator
- light panel
- light relay
- light running
- light sensitivity
- light spectrum
- light stability
- lightest
- lighting model
- lightning conductor
- lightware communications
- like
- like terms
- likelihood
- likelihood ratio
- likely
- likeness
- lime
- lime pit
- limit check
- limit count
- limit cycle
- limit normal
- limited signal
- limited variation
- limited warranties
- limiter
- limiter amplifier
- limiting accuracy
- limiting case
- limiting condition
- limiting current
- limiting error
- limiting ordinal
- limiting set
- limiting settlement
- limits file
- lindeduffs space
- line access
- line adapter
- line analyzer
- line attribute
- line bandwidth
- line break
- line capacity
- line card
- line chart
- line classification
- line command
- line communication
- line concentration
- line concentrator
- line conic
- line control
- line cost