noun
hartley
HAHT-lee
noun
1
A unit of information equal to the amount contained in one decimal digit (i.e., a choice among ten equally likely outcomes).
"A four-digit PIN carries about four hartleys of information."
How to Use Hartley
Learner’s notesIn plain EnglishA technical unit used in information theory, less common than the "bit."
When to use it
A specialist/technical term, rarely used outside information theory and engineering.
Word Forms
hartleys plural
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A four-digit PIN carries about four _____ of information.
Etymology
Named after electronics researcher Ralph Hartley (1888-1970), who studied the measurement of information.