- add gate
- add instruction
- add legend
- add mode
- add operation
- add output
- add overlay
- add pulse
- add together
- add up
- add-in
- add-on
- addax
- added metal
- added years
- added-value
- addend
- addend digit
- addend register
- addenda
- addendum
- addendum circle
- addendum line
- adder
- adder accumulator
- adder amplifier
- adder circuit
- adder-in
- adder-spit
- adder-subtracter
- adder-subtractor
- addict
- addicted
- addiction
- adding
- adding circuit
- adding counter
- adding element
- adding network
- adding operator
- adding tape
- adding up
- adding-machine
- addition
- addition agent
- addition character
- addition compound
- addition file
- addition haploid
- addition item
- addition operator
- addition polymer
- addition polymerization
- addition record
- addition sign
- addition table
- additional
- additional acceleration
- additional air
- additional allocation
- additional allotment
- additional arbitrator
- additional article
- additional benefit
- additional bit
- additional brake
- additional broadening
- additional budget
- additional building
- additional character
- additional characters
- additional charge
- additional charges
- additional clause
- additional commitments
- additional compaction
- additional coverage
- additional crushing
- additional deduction
- additional element
- additional entry
- additional equipment
- additional error
- additional expenses
- additional feature
- additional freight
- additional function
- additional grinding
- additional instruction
- additional insurance
- additional investment
- additional item
- additional keyboard
- additional labour
- additional load
- additional loudspeaker
- additional margin
- additional markdown
- additional markup
- additional mass