[PAR] [TLE] Unit of time [SEP] A unit of time or time unit is any particular time interval, used as a standard way of measuring or expressing duration.  The base unit of time in the International System of Units (SI), and by extension most of the Western world, is the second, defined as about 9 billion oscillations of the caesium atom.  The exact modern definition, from the National Institute of Standards and Technology is: [PAR] [TLE] National Institute of Standards and Technology [SEP] The National Institute of Standards and Technology (NIST) is a measurement standards laboratory, and a non-regulatory agency of the United States Department of Commerce.  Its mission is to promote innovation and industrial competitiveness.
[PAR] [TLE] Unit of time [ SEP ] A unit of time or time unit is any particular time interval , used as a standard way of measuring or expressing duration . The base unit of time in the International System of Units ( SI ) , and by extension most of the Western world , is the second , defined as about 9 billion oscillations of the caesium atom . The exact modern definition , from the National Institute of Standards and Technology is : [PAR] [TLE] National Institute of Standards and Technology [ SEP ] The National Institute of Standards and Technology ( NIST ) is a measurement standards laboratory , and a non - regulatory agency of the United States Department of Commerce . Its mission is to promote innovation and industrial competitiveness .
A unit of time or time unit is any particular time interval, used as a standard way of measuring or expressing duration, the exact modern definition, is from the National Institute of Standards and Technology (NIST), a measurement standards laboratory, and a non-regulatory agency of which organization?
A unit of time or time unit is any particular time interval , used as a standard way of measuring or expressing duration , the exact modern definition , is from the National Institute of Standards and Technology ( NIST ) , a measurement standards laboratory , and a non - regulatory agency of which organization ?
United States Department of Commerce
United States Department of Commerce