Prefix for 10**15 & 10**18 ?

Prefix for 10**15 & 10**18 ?

Post by Brian Jay Gou » Thu, 26 Mar 1992 12:40:52



I know this isn't a real "computer" issue.  But this
is certainly the right place to find the answer...

10**3 - kilo
10**6 - mega
10**9 - giga
10**12 - tera

10**15 - ????
10**18 - ????

Please someone send e-mail to me.  Thanks.
--
--
Any disclaimers made for me, by me, or about me - may or may not accurately
reflect my failure to be reflecting the opinions of myself or anyone else.
*************************************************
*  Brian Jay Gould - Professional Brain-stormer *
*************************************************

 
 
 

Prefix for 10**15 & 10**18 ?

Post by Erik Nagg » Fri, 27 Mar 1992 14:44:06



|  
|   I know this isn't a real "computer" issue.  But this
|   is certainly the right place to find the answer...

Even though you asked for e-mail, I have included the following list
of prefixes and names if there are more people who want to know:

Prefix          Name            Power of 10

E               exa             +18
P               peta            +15
T               tera            +12
G               giga             +9
M               mega             +6
k or K          kilo             +3
h or H          hecto            +2
D               deka             +1
d               deci             -1
c               centi            -2
m               milli            -3
(greek mu)      micro            -6
n               nano             -9
p               pico            -12
f               femto           -15
a               atto            -18

(snatched from the HP 48SX Owner's Manual.)

rgds
</Erik>

--
Erik Naggum       |  +47-295-0313     |  ISO 8879 SGML     |  Memento,
Naggum Software   |                   |  DIS 10744 HyTime  |  terrigena.



 
 
 

Prefix for 10**15 & 10**18 ?

Post by Dr. Aivars Celmin » Fri, 27 Mar 1992 22:36:44



Quote:>10**12 - tera

>10**15 - ????
>10**18 - ????

  10**12  =  tera  (Tm  =  terametres)
  10**15  =  peta  (Ps  =  petaseconds)
  10**18  =  exa   (Eg  =  Exagrams)
 
 
 

Prefix for 10**15 & 10**18 ?

Post by Peter Whittak » Sat, 28 Mar 1992 05:44:49



>k or K          kilo             +3
>h or H          hecto            +2

Valid prefixes are defined as part of SI ("Systeme Internationale",
better known as "the metric system").

Unsure about hecto's prefix, but kilo's is "k", not "K".  "K" is a
prefix used in the computer world to denote... (left as an exercise to
the reader).  IMHO, "H" is unnaceptable for hecto.

Quote:>(snatched from the HP 48SX Owner's Manual.)

Better report their error to them, then.

pww

 
 
 

Prefix for 10**15 & 10**18 ?

Post by Norman Diamo » Sat, 28 Mar 1992 10:52:48




>>   I know this isn't a real "computer" issue.

Ah, no wonder Mr. Naggum replied with a non "computer" answer  :-)
Below, I adjust the replies to suit the newsgroup "comp".misc  :-)

Prefix          Name            Power of 10        Power of 2

E               exa                                +60
P               peta                               +50
T               tera                               +40
G               giga                               +30
M               mega                               +20
k or K          kilo                               +10
h or H          hecto                      N/A
D               deka                       N/A
d               deci                       N/A
c               centi                      N/A
m               milli            -3                          (hardware only)
(greek mu)      micro            -6                          (hardware only)
n               nano             -9                          (hardware only)
p               pico            -12                          (hardware only)
f               femto           -15                          (hardware only)
a               atto            -18                          (hardware only)

Quote:>(snatched from the HP 48SX Owner's Manual.)

From a COMPUTER manual???!!!   Oh, for shame.  A sad day in computer land.  :-)
--

If this were the company's opinion, I wouldn't be allowed to post it.
"Yeah -- bad wiring.  That was probably it.  Very bad."
 
 
 

Prefix for 10**15 & 10**18 ?

Post by John Hawkins » Sat, 28 Mar 1992 12:47:11




>Unsure about hecto's prefix, but kilo's is "k", not "K".  "K" is a
>prefix used in the computer world to denote... (left as an exercise to
>the reader).  IMHO, "H" is unnaceptable for hecto.
>>(snatched from the HP 48SX Owner's Manual.)
>Better report their error to them, then.

Well, the HP48SX owners manual (p.192 of vol. I, btw) tells you what's
acceptable to the HP48, and then goes on to say that it is a superset
of SI (with the exception of deka: "D" for the '48 and "da" for SI); it
does NOT claim to tell you what's SI.

Quote:>pww

--
John Hawkinson

 
 
 

Prefix for 10**15 & 10**18 ?

Post by Dr. Aivars Celmin » Sun, 29 Mar 1992 00:04:29




   ..........
>Prefix              Name            Power of 10
   ..........
>k or K          kilo             +3
>h or H          hecto            +2
>D               deka             +1
>d               deci             -1
>c               centi            -2

  .........

  According the International System of Units (SI) rules this should be
  modified:

   1) Only prefixes above kilo have upper case letters. Hence "kilo"
      is "k" and not "K".

   2) hecto, deka, deci and centi should be avoided whenever possible.

   3) The prefix symbol for deka is "da", not "D".

 
 
 

Prefix for 10**15 & 10**18 ?

Post by Arlie Dav » Mon, 30 Mar 1992 06:18:59



Quote:>  According the International System of Units (SI) rules this should be
>  modified:

>   1) Only prefixes above kilo have upper case letters. Hence "kilo"
>      is "k" and not "K".

When one is doing nothing but programming, or something computer-related,
there is no doubt that k or K stand for 1024 = 2**10.  When one is doing
something that is related only to the more traditional sciences, there is
no doubt that it stands for 1000.

However, quite often one must deal with both, so it is convenient to
designate K as 1024, and k as 1000.

--
Arlie Davis

"I can lose myself in Chinese art and American women..." -- Robert Smith