plural of blue circle rate

(telecommunications) an ISDN service delivered over T1, E1 or J1 datalines, with delivery of connections between 1472 kilobits per second and 1984 kilobits per second (kibibits)

A metric that estimates how well a television programme or advertisement reached its target audience

(astronomy) The number of meteors a single observer would see in one hour under a clear, dark sky (i.e. up to the limiting apparent magnitude of 6.5).

plural of Zenithal Hourly Rate

(demography) The difference between the crude birth rate and the crude death rate of a population

(demography) Number of deaths in a society per 1,000 people per year

(demography) Number of childbirths in a society per 1,000 people per year

(geography) The total number of deaths in a year among infants under one year of age for every 1,000 live births in a society.

An ISDN subscriber line that provides two B channels and 1 D channel.