to make good use of; to use to one's advantage
scope; valid range; effective range (e.g. in broadcasting); coverage
term of validity; expiration date (of medicine, credit card, etc.)
enabling; activation; validation
term of validity; period for which something is valid (e.g. ticket)
ratio of job openings to job applicants
effective population size
effective use; making effective use (of)
most significant bit; MSB
least significant bit; LSB
effective data transfer rate
effective utilization; efficient use
(number of) valid pixels; effective pixels
significant figures; significant digits
Law for the Promotion of Utilization of Recycled Resources
effective range (of a firearm, missile, etc.); effective firing range