Units of Information - Maple Help

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Units of Information

Description

• 

Amount of information is a non-SI base dimension. The unit of amount of information is the bit.

• 

Units of information take IEC prefixes, not SI prefixes.  Thus, 1024 bytes is a kibibyte, not a kilobyte.

• 

Maple knows the units of information listed in the following table.

Name

Symbols

Context

Alternate Spellings

Prefixes

 

 

 

 

 

bit

 

information *

bits

IEC

crumb

 

information *

crumbs

IEC

nibble

 

information *

nibbles nybble nybbles

IEC

byte

 

information *

bytes

IEC

nickle

 

information *

nickles

IEC

word

 

information *

words

IEC

double_word

 

information *

double_words

IEC

gawble

 

information *

gawbles

IEC

block

 

information *

blocks

IEC

bit_per_second

bps

information *

bits_per_second

IEC

  

An asterisk ( * ) indicates the default context, an at sign (@) indicates an abbreviation, and under the prefixes column, SI indicates that the unit takes all SI prefixes, IEC indicates that the unit takes IEC prefixes, and SI+ and SI- indicate that the unit takes only positive and negative SI prefixes, respectively.  Refer to a unit in the Units package by indexing the name or symbol with the context, for example, bit[information] or bps[information]; or, if the context is indicated as the default, by using only the unit name or symbol, for example, bit or bps.

  

 

  

The units of information are defined as follows.

  

A crumb is defined as 2 bits.

  

A nibble is defined as 4 bits.

  

A byte is defined as 8 bits.

  

A nickle is defined as 10 bits.

  

A word is defined as 16 bits.

  

A double word is defined as 32 bits.

  

A gawble is defined as 48 bits.

  

A block is defined as 4096 bits.

  

A bit_per_second is defined as a bit per second. (This is a unit with dimension amount_of_informationtime.)

Examples

convert'byte','dimensions','base'=true

amount_of_information

(1)

convert1,'units','mebibytes','bits'

8388608

(2)

See Also

convert/dimensions, convert/units, Units, Units/Index, Units[Prefixes]


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