Information Technology Reference
In-Depth Information
Table 9.2
Units of data
volume
Unit
Value (bytes)
Denotation
2
10
10
3
Kilobyte
≈
Kb, Kbyte
2
20
≈
10
6
Megabyte
Mb, Mbyte
2
30
10
9
Gigabyte
≈
Gb, Gbyte
2
40
10
12
Terabyte
≈
Tb, Tbyte
2
50
≈
10
15
Petabyte
Pb, Pbyte
2
60
10
18
Exabyte
≈
Eb, Ebyte
2
70
10
21
Zettabyte
≈
Zb, Zbyte
2
80
≈
10
24
Yottabyte
Yb, Ybyte
architectures, in particular asynchronous processors without a central clock. Also,
“gigaflops” strictly means a billion floating point operations per second, but is widely
used to mean a billion instructions of any kind. Architecture-independent measures
such as benchmarks may be more appropriate.
For quantities greater than 1, the unit is plural. For smaller quantities, the conven-
tion is that the unit is singular, but in computer science this convention is often not
observed.
The average run took 1.3 seconds, and the fastest took 0.8 second.
The average run took 1.3 seconds, and the fastest took 0.8 seconds.
Units should be typeset in the font used in the paper for text, even when they are part
of a mathematical expression.
The volume is
r
p
Kb
in total.
The volume is
r
p
Kb in total.
Put white space between values and units. Write “11.2 Kbytes” rather than
“11.2Kbytes”; the second form may be common, but it is much harder to read.
Numbers and their units should be hyphenated when used as an adjective.
We also tried the method on the 2.7-Kb input.
