null - opti
- null
- null character
- null current
- null frequency
- null hypothesis
- null point
- null representation
- null string
- null voltage
- number
- number generator
- number of
- number of coils
- number of cycles
- number of defects
- number of lines
- number of observed values
- number of revolutions
- number of revolutions: rpm
- number of starts
- number of starts in mating worm
- number of teeth
- number of turns
- number per package
- number representation
- number system
- numbering
- numbering stamp
- numeral
- numeration
- numerative system
- numeric
- numeric character
- numeric code
- numeric example
- numeric readout
- numeric word
- numerical
- numerical analysis
- numerical bits
