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・ precedence
・ precedence lossage
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・ predecessor
・ predicate calculus
・ predicate logic
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prefix
・ prefix notation
・ prefix syntax
・ prep
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・ prepend
・ preprocessor
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prefix : FOLDOC
prefix
1. The standard metric prefixes used in the Systme International d'Units (SI) conventions for scientific measurement.
Here are the SI magnifying prefixes, along with the corresponding binary interpretations in common use:
prefix abr decimal binary

yocto- 1000^-8
zepto- 1000^-7
atto- 1000^-6
femto- f 1000^-5
pico- p 1000^-4
nano- n 1000^-3
micro- * 1000^-2 * Abbreviation: Greek mu
milli- m 1000^-1

kilo- k 1000^1 1024^1 = 2^10 = 1,024
mega- M 1000^2 1024^2 = 2^20 = 1,048,576
giga- G 1000^3 1024^3 = 2^30 = 1,073,741,824
tera- T 1000^4 1024^4 = 2^40 = 1,099,511,627,776
peta- 1000^5 1024^5 = 2^50 = 1,125,899,906,842,624
exa- 1000^6 1024^6 = 2^60 = 1,152,921,504,606,846,976
zetta- 1000^7 1024^7 = 2^70 = 1,180,591,620,717,411,303,424
yotta- 1000^8 1024^8 = 2^80 = 1,208,925,819,614,629,174,706,176

"Femto" and "atto" derive not from Greek but from Danish.
The abbreviated forms of these prefixes are


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