COMPGROUPS.NET | Search | Post Question | Groups | Stream | About | Register

### How the computer identify an NaN?

• Email
• Follow

```Hi,

I encounter NaN often in Matlab. Recently, I use Matlab to generate
some code for an embedded project. I get the following source code
from Matlab below dot line.

I don't understand the line:
c_y = (b_u != b_u);

Could you explain it to me? More specific,        what result can get
from: (b_u != b_u);?

How does it relate to NaN?

Thanks a lot.

BTW, real_T and boolean_T just like int and bool in C I think.

.................................
real_T b_u0;
real_T b_u;
boolean_T c_y;

b_u0 = (real_T)Idata;
b_u = b_u0;
c_y = (b_u != b_u);
if (c_y) {
d_y = rtNaN;
} else {
d_y = b_u0 * b_u0;
}

..............
```
 0
Reply rxjwg98 (320) 8/16/2011 3:19:29 AM

See related articles to this posting

```fl <rxjwg98@gmail.com> writes:

> I encounter NaN often in Matlab. Recently, I use Matlab to generate
> some code for an embedded project. I get the following source code
> from Matlab below dot line.
>
> I don't understand the line:
>        c_y = (b_u != b_u);
>
> Could you explain it to me? More specific,        what result can get
> from: (b_u != b_u);?

The != operator always gives 0 or 1 depending on the result of the
comparison.  It's a not-equals comparison so it is asking if b_u is not
equal to itself.  A NaNs won't compare equal to anything -- even another
NaN, so b_u != b_u is a way to ask if b_u is a NaN.

<snip>
--
Ben.
```
 0
Reply ben.usenet (6790) 8/16/2011 3:33:50 AM

```On 15 ao=FBt, 23:33, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
> fl <rxjw...@gmail.com> writes:
> > I encounter NaN often in Matlab. Recently, I use Matlab to generate
> > some code for an embedded project. I get the following source code
> > from Matlab below dot line.
>
> > I don't understand the line:
> > =A0 =A0 =A0 =A0c_y =3D (b_u !=3D b_u);
>
> > Could you explain it to me? More specific, =A0 =A0 =A0 =A0what result c=
an get
> > from: (b_u !=3D b_u);?
>
> The !=3D operator always gives 0 or 1 depending on the result of the
> comparison. =A0It's a not-equals comparison so it is asking if b_u is not
> equal to itself. =A0A NaNs won't compare equal to anything -- even anothe=
r
> NaN, so b_u !=3D b_u is a way to ask if b_u is a NaN.
>
> <snip>
> --
> Ben.

If NaN won't equal to anything, any number will not equal to itself
either. I still do not understand b_u !=3D b_u;

ex:
b_u =3D 3;
(b_u!=3Db_u) =3D=3D> 1, right?

Thanks,
```
 0
Reply rxjwg98 (320) 8/16/2011 4:45:19 AM

```On Mon, 15 Aug 2011 21:45:19 -0700 (PDT), fl <rxjwg98@gmail.com>
wrote:

>On 15 ao�t, 23:33, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
>> fl <rxjw...@gmail.com> writes:
>> > I encounter NaN often in Matlab. Recently, I use Matlab to generate
>> > some code for an embedded project. I get the following source code
>> > from Matlab below dot line.
>>
>> > I don't understand the line:
>> > � � � �c_y = (b_u != b_u);
>>
>> > Could you explain it to me? More specific, � � � �what result can get
>> > from: (b_u != b_u);?
>>
>> The != operator always gives 0 or 1 depending on the result of the
>> comparison. �It's a not-equals comparison so it is asking if b_u is not
>> equal to itself. �A NaNs won't compare equal to anything -- even another
>> NaN, so b_u != b_u is a way to ask if b_u is a NaN.
>>
>> <snip>
>> --
>> Ben.
>
>If NaN won't equal to anything, any number will not equal to itself
>either. I still do not understand b_u != b_u;
>
>ex:
>b_u = 3;
>(b_u!=b_u) ==> 1, right?

IEEE NaNs are special in a lot of ways.  As Ben said, a NaN does not
compare equal to anything, even another NaN.  An IEEE FP comparison is
*not* a direct comparison of the bit patterns of the two operands.  A
NaN compared to anything else (including another NaN) also has no
order (IOW, "NaN > 3", "NaN == 3" and "NaN < 3" are *all* false, while
"NaN != 3" is true).

The "if (f != f)" trick works on many implementations using IEEE math
(all that I'm aware of), but it would probably be safer to use the
isnan() function provided by many implementations (and required by C99
- where it's a macro).
```
 0
Reply robertwessel2 (1674) 8/16/2011 5:45:51 AM

```"fl" <rxjwg98@gmail.com> schrieb im Newsbeitrag
news:9d47f418-5533-414f-b9da-15385ce9c442@c19g2000yqe.googlegroups.com...
....
If NaN won't equal to anything, any number will not equal to itself
either. I still do not understand b_u != b_u;

ex:
b_u = 3;
(b_u!=b_u) ==> 1, right?

Thanks,

Have you tried?
I doubt that.

Heiner

```
 0
Reply invalid171 (7011) 8/16/2011 6:51:01 AM

```On Tuesday, August 16, 2011 7:51:01 AM UTC+1, Heinrich Wolf wrote:
> "fl" <rxj...@gmail.com> schrieb im Newsbeitrag
> ...
> If NaN won't equal to anything, any number will not equal to itself
> either. I still do not understand b_u != b_u;
>
> ex:
> b_u = 3;
> (b_u!=b_u) ==> 1, right?
>
> Thanks,
>
> Have you tried?
> I doubt that.
>
> Heiner

You should listen more carefully when
people who have a complete understanding
of some topic try to explain it to you.

Where 'b' is a real, (b != b) is 1 or 0,
depending strictly on whether the current
value of 'b' is a NaN, or is not a NaN.
--
```
 0
Reply bert.hutchings (60) 8/16/2011 9:01:13 AM

```"bert" <bert.hutchings@btinternet.com> schrieb im Newsbeitrag
news:0e6e63f1-e63e-4e52-9db5-ec1807044878@glegroupsg2000goo.googlegroups.com...
....
>> ex:
>> b_u = 3;
>> (b_u!=b_u) ==> 1, right?
>>
>> Thanks,
>>
>> Have you tried?
>> I doubt that.
>>
>> Heiner
>
> You should listen more carefully when
> people who have a complete understanding
> of some topic try to explain it to you.
>
> Where 'b' is a real, (b != b) is 1 or 0,
> depending strictly on whether the current
> value of 'b' is a NaN, or is not a NaN.
> --

pardon?
I noticed that b_u is a real which results in 3.0 by assignment;
Why should (3.0 != 3.0) result in 1?

```
 0
Reply invalid171 (7011) 8/16/2011 11:04:47 AM

```Asking NaN != NaN looks reasonable to me.
But asking 3 != 3 looks like trolling.

```
 0
Reply invalid171 (7011) 8/16/2011 11:22:15 AM

```Heinrich Wolf <invalid@invalid.invalid> wrote:

> "bert" <bert.hutchings@btinternet.com> schrieb im Newsbeitrag
> news:0e6e63f1-e63e-4e52-9db5-ec1807044878@glegroupsg2000goo.googlegroups.com...
> ...
> >> ex:
> >> b_u = 3;
> >> (b_u!=b_u) ==> 1, right?
> >>
> >> Have you tried?
> >> I doubt that.
> >>
> > You should listen more carefully when
> > people who have a complete understanding
> > of some topic try to explain it to you.
> >
> > Where 'b' is a real, (b != b) is 1 or 0,
> > depending strictly on whether the current
> > value of 'b' is a NaN, or is not a NaN.
> > --

> pardon?
> I noticed that b_u is a real which results in 3.0 by assignment;
> Why should (3.0 != 3.0) result in 1?

You snipped the most relevant part of your own post, i.e.

>>> If NaN won't equal to anything, any number will not equal to itself
>>> either. I still do not understand b_u != b_u;

and the statement made by "bert" was that

b != b

evaluates to 1 if b is not-NaN (e.g. for b set to 3) but to 0
if b is NaN (always assuming that IEEE floating point represen-
tation is used).

The claim you made (and then snipped in your reply) is wrong
(that's not a question of logic but due to the way things are
required by the IEEE standard for floating point handling) and
that's what the "Have you tried" was refering to.

Regards, Jens
--
\   Jens Thoms Toerring  ___      jt@toerring.de
\__________________________      http://toerring.de
```
 0
Reply jt68 (1148) 8/16/2011 11:28:40 AM

```Jens Thoms Toerring <jt@toerring.de> wrote:
> Heinrich Wolf <invalid@invalid.invalid> wrote:

> > "bert" <bert.hutchings@btinternet.com> schrieb im Newsbeitrag
> > news:0e6e63f1-e63e-4e52-9db5-ec1807044878@glegroupsg2000goo.googlegroups.com...
> > ...
> > >> ex:
> > >> b_u = 3;
> > >> (b_u!=b_u) ==> 1, right?
> > >>
> > >> Have you tried?
> > >> I doubt that.
> > >>
> > > You should listen more carefully when
> > > people who have a complete understanding
> > > of some topic try to explain it to you.
> > >
> > > Where 'b' is a real, (b != b) is 1 or 0,
> > > depending strictly on whether the current
> > > value of 'b' is a NaN, or is not a NaN.
> > > --

> > pardon?
> > I noticed that b_u is a real which results in 3.0 by assignment;
> > Why should (3.0 != 3.0) result in 1?

> You snipped the most relevant part of your own post, i.e.

> >>> If NaN won't equal to anything, any number will not equal to itself
> >>> either. I still do not understand b_u != b_u;

> and the statement made by "bert" was that

>    b != b

> evaluates to 1 if b is not-NaN (e.g. for b set to 3) but to 0
> if b is NaN (always assuming that IEEE floating point represen-
> tation is used).

Sorry, got that just the wrong way round

For b = 3      b != b     results in 0
For b = NaN    b != b     results in 1

Regards, Jens
--
\   Jens Thoms Toerring  ___      jt@toerring.de
\__________________________      http://toerring.de
```
 0
Reply jt68 (1148) 8/16/2011 11:31:31 AM

```"Jens Thoms Toerring" <jt@toerring.de> schrieb im Newsbeitrag
news:9av2ojF9heU4@mid.uni-berlin.de...
....
> Sorry, got that just the wrong way round
....

I don't mind.
You're welcome!

```
 0
Reply invalid171 (7011) 8/16/2011 12:08:09 PM

```"Heinrich Wolf" <invalid@invalid.invalid> schrieb im Newsbeitrag
news:j2ditd\$t3d\$1@news.m-online.net...
....
>> You should listen more carefully when
>> people who have a complete understanding
>> of some topic try to explain it to you.
....
I am sorry and I apologize. Too short sleep this night ...

```
 0
Reply invalid171 (7011) 8/16/2011 12:17:09 PM

```jt@toerring.de (Jens Thoms Toerring) writes:

> Heinrich Wolf <invalid@invalid.invalid> wrote:
>
>> "bert" <bert.hutchings@btinternet.com> schrieb im Newsbeitrag
>> news:0e6e63f1-e63e-4e52-9db5-ec1807044878@glegroupsg2000goo.googlegroups.com...
>> ...
>> >> ex:
>> >> b_u = 3;
>> >> (b_u!=b_u) ==> 1, right?
>> >>
>> >> Have you tried?
>> >> I doubt that.

This thread has been screwed up.  When Heinrich Wolf first posted he did
not correctly quote the post he was replying to.  I think several
replies have confused who said what after that.

>> > You should listen more carefully when
>> > people who have a complete understanding
>> > of some topic try to explain it to you.

This was in reply to Heinrich who said only "Have you tried it?" though
it looked like he repeated fl's confusion.

>> > Where 'b' is a real, (b != b) is 1 or 0,
>> > depending strictly on whether the current
>> > value of 'b' is a NaN, or is not a NaN.
>> > --
>
>> pardon?
>> I noticed that b_u is a real which results in 3.0 by assignment;
>> Why should (3.0 != 3.0) result in 1?
>
> You snipped the most relevant part of your own post, i.e.

>>>> If NaN won't equal to anything, any number will not equal to itself
>>>> either. I still do not understand b_u != b_u;

This was not said by Heinrich but by fl.

<snip>
--
Ben.
```
 0
Reply ben.usenet (6790) 8/16/2011 12:37:21 PM

```On 08/16/2011 12:45 AM, fl wrote:
....
> If NaN won't equal to anything, any number will not equal to itself
> either. ...

That does not follow. There's no connection between those two clauses
that I can see. The first one is true and the second one is false, so
whatever connection you see between those two clauses is invalid.

> ... I still do not understand b_u != b_u;
>
> ex:
> b_u = 3;
> (b_u!=b_u) ==> 1, right?

No. This is a special rule for NaN's; 3 is not a NaN, so the rule
doesn't apply. Some examples that might clarify this:

3.0 != 3.0;	// False
3.0 != 5.0;	// True
5.0 != 5.0;	// False
NaN != NaN;	// True
3.0 != Nan;	// True
NaN != 5.0;	// True

The special rule, that a NaN doesn't compare equal to anything, applies
to all of the last three statements. It doesn't apply to any of the
first three, because none of the first three statements involve a NaN.
--
James Kuyper
```
 0
Reply jameskuyper (5639) 8/16/2011 12:42:58 PM

```On 15-Aug-11 23:45, fl wrote:
> If NaN won't equal to anything, any number will not equal to itself
> either.

Incorrect.

A number is always equal to itself.  However, a NaN is Not a Number, and
the rules are different from numbers: it never compares equal to itself.

> I still do not understand b_u != b_u;
>
> ex:
> b_u = 3;
> (b_u!=b_u) ==> 1, right?

Since 3 is a number, (3 != 3) is false.  That condition would only be
true for NaNs, which are not numbers.

S

--
Stephen Sprunk         "God does not play dice."  --Albert Einstein
CCIE #3723         "God is an inveterate gambler, and He throws the
K5SSS        dice at every possible opportunity." --Stephen Hawking
```
 0
Reply stephen (1366) 8/16/2011 2:25:52 PM

```On 2011-08-16, Heinrich Wolf <invalid@invalid.invalid> wrote:
> Asking NaN != NaN looks reasonable to me.
> But asking 3 != 3 looks like trolling.

It's an explaination of how logical expressions involving real numbers
(which may be NaN) are handled. In pseudo-C:

bool double_equals(const double a, const double b)
{
if (isnan(a) || isnan(b))
return false;

[...]
}

In other words, any comparison between two real numbers (less than,
equals, greater than) will always yield false if either operant is NaN.

Because of that, the expression "a != a" always returns true if a is
NaN, and false if it is not. And thus, "a != a" is a way to test if a
is NaN.

Yes, it mystified me too at first, but once it was explained it made
sense. ^^

--
"C provides a programmer with more than enough rope to hang himself.
C++ provides a firing squad, blindfold and last cigarette."
- seen in comp.lang.c
```
 0
Reply news104 (799) 8/16/2011 3:17:08 PM

```fl <rxjwg98@gmail.com> writes:

> On 15 août, 23:33, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
>> fl <rxjw...@gmail.com> writes:
>> > I encounter NaN often in Matlab. Recently, I use Matlab to generate
>> > some code for an embedded project. I get the following source code
>> > from Matlab below dot line.
>>
>> > I don't understand the line:
>> >        c_y = (b_u != b_u);
>>
>> > Could you explain it to me? More specific,        what result can get
>> > from: (b_u != b_u);?
>>
>> The != operator always gives 0 or 1 depending on the result of the
>> comparison.  It's a not-equals comparison so it is asking if b_u is not
>> equal to itself.  A NaNs won't compare equal to anything -- even another
>> NaN, so b_u != b_u is a way to ask if b_u is a NaN.
>>
>> <snip>
>> --
>> Ben.
>
> If NaN won't equal to anything, any number will not equal to itself
> either. I still do not understand b_u != b_u;
>
> ex:
> b_u = 3;
> (b_u!=b_u) ==> 1, right?

No, b_u!=b_u ==> 0, since they are indeed equal.

Do you understand that NaN is an abbreviation for "Not a Number"? NaN is
a specific bit pattern (actually, a pattern from a set defined by your
floating point representation) that is recognized by the floating point
number unit as meaning "this is not a number", and gets treated
specially.

So for instance, if you add anything to it, the result is also Not a
Number.  And if you compare it to anything, the result is !=.  So for
any valid number b_u, b_u==b_u.  But for NaN, NaN!= NaN.

I'll bet you'd get better Matlab-specific advice in a Matlab
newsgroup...
```
 0
Reply pfeiffer (700) 8/16/2011 6:37:41 PM

```Joe Pfeiffer <pfeiffer@cs.nmsu.edu> writes:
[...]
> I'll bet you'd get better Matlab-specific advice in a Matlab
> newsgroup...

Like comp.soft-sys.matlab (I don't know how active it is).

--
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Nokia
"We must do something.  This is something.  Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
```
 0
Reply kst-u (21963) 8/16/2011 7:26:21 PM

```Ben Bacarisse <ben.usenet@bsb.me.uk> wrote:
> jt@toerring.de (Jens Thoms Toerring) writes:

> > Heinrich Wolf <invalid@invalid.invalid> wrote:
> >
> >> "bert" <bert.hutchings@btinternet.com> schrieb im Newsbeitrag
> >> news:0e6e63f1-e63e-4e52-9db5-ec1807044878@glegroupsg2000goo.googlegroups.com...
> >> ...
> >> >> ex:
> >> >> b_u = 3;
> >> >> (b_u!=b_u) ==> 1, right?
> >> >>
> >> >> Have you tried?
> >> >> I doubt that.

> This thread has been screwed up.  When Heinrich Wolf first posted he did
> not correctly quote the post he was replying to.  I think several
> replies have confused who said what after that.

> >> > You should listen more carefully when
> >> > people who have a complete understanding
> >> > of some topic try to explain it to you.

> This was in reply to Heinrich who said only "Have you tried it?" though
> it looked like he repeated fl's confusion.

> >> > Where 'b' is a real, (b != b) is 1 or 0,
> >> > depending strictly on whether the current
> >> > value of 'b' is a NaN, or is not a NaN.
> >> > --
> >
> >> pardon?
> >> I noticed that b_u is a real which results in 3.0 by assignment;
> >> Why should (3.0 != 3.0) result in 1?
> >
> > You snipped the most relevant part of your own post, i.e.

> >>>> If NaN won't equal to anything, any number will not equal to itself
> >>>> either. I still do not understand b_u != b_u;

> This was not said by Heinrich but by fl.

Aoory and my apologies to Heinrich Wolf. Hadn't read the
attribution lines carefully enough...

Best regards, Jens
--
\   Jens Thoms Toerring  ___      jt@toerring.de
\__________________________      http://toerring.de
```
 0
Reply jt68 (1148) 8/16/2011 9:13:17 PM

18 Replies
49 Views

Similar Articles

12/12/2013 2:03:51 PM
[PageSpeed]

 Reply:

Similar Artilces:

SKILL: Function to identify OS or computer?
I'm trying to modify my bindkey file so that it tests what kind of system is loading it. Based on that, I'll write some extra code that changes the ESC-key to "Meta" if it's on a Sun/Solaris and "Alt" otherwise. Anyone know of such a function or have a nice, elegant way to get around this? Thanks in advacne, Edward Edward, There was a similar discussion on this forum: http://groups.google.com/group/comp.cad.cadence/browse_frm/thread/66ffbd9ff4da2479?tvc=1 There is a private function hiiGetModifierList(), it returns a list, you can take car(hiiGetModifie...

Need help identifying a Computer Notebook part!
Please help me indentify this part, I need to buy a replacement but can't seem to find a place that carries it. Any suggestions are welcome. See link for picture. This belongs to a Toshiba Satellite P25-S509 notebook computer. This part connects to the HD, it broke while replacing the HD. http://www.nobox.net/temp/ToshibaP25.jpg Thanks in advance for any help. <ginoman@gmail.com> wrote in message news:1140401700.491677.89070@z14g2000cwz.googlegroups.com... > Please help me indentify this part, I need to buy a replacement but > can't seem to find a place that carri...

Use another Computer for computation
Hi, I've two computer: -an old portable (A); -a new gen desktop (B); Is there a way to write the code in the computer A and the do the computation with computer B trought internet or wi-fi? (Think computer B as a server and A as a client). Thanks. ...

max(NaN,0) should be NaN
After tracking down a bug in my Fortran program, I found that it assumed max(NaN,0.) = 0. This makes no sense, as the outcome of the operation is undefined and should be NaN. max(NaN,0.) = NaN After researching, it appears the first outcome is accepted behavior, and might be included in the revised IEEE 754 standard, which affects not only Fortran. The discussion posted at www.cs.berkeley.edu/~ejr/Projects/ieee754/meeting-minutes/02-11-21.html#minmax suggests that "There is no mathematical reason to prefer one reason to another." But I think otherwise, for the following reason. ...

Call for Papers: The 2009 World Congress in Computer Science, Computer Engineering, and Applied Computing (WORLDCOMP'09)
CALL FOR PAPERS and Call For Workshop/Session Proposals WORLDCOMP'09 The 2009 World Congress in Computer Science, Computer Engineering, and Applied Computing July 13-16, 2009, Las Vegas, USA (composed of 22 Joint Conferences) You are invited to submit a paper (and/or a proposal to organize a session/workshop). All accepted papers will be published in the respective conference proceedings. The 2009 World Congress in Computer Science, Computer E...

difference between computer architecture and computer organization
Hi every thing is in the title. what is the difference between 1- computer architecture and 2- Computer organization Many thanks rachida75fr@yahoo.fr wrote: > Hi > every thing is in the title. what is the difference between > 1- computer architecture > and > 2- Computer organization Computer architecture deals with how a computer is organized, so at first, one would think there was little difference. But the architecture of a computer deals with things like... what kind of arithmetic units are used, what is the pathway to memory, how is the instruction set designed. I k...

Computer to Computer AirPort networks not accessible
I'm a Mac newbie, but I have lots of experience with Linux and Windows. I have got my AirPort-enabled iBook G4 working fine with my office network which uses a hardware base station. However, I can't get it to talk to my home network which has an ad-hoc (IBSS) network running on a Linux gateway machine. When I click on the AirPort icon, "Computer to Computer Networks" is greyed out. It used to work fine with my Linux laptop. I am using the same WEP key on the home network as on the office network. I don't have any weird settings except for using channel 8 (on both n...

osm computer corporation zeus4 computer
Does anybody have any information on this. thanks william ...

Identifier expected but I have identifier, please help
/* * IconHandler.java * * Created on March 22, 2007, 11:57 AM * * To change this template, choose Tools | Template Manager * and open the template in the editor. */ package com.ppowell.tools.imagetools; import java.net.URL; import javax.swing.ImageIcon; /** * * @author ppowell-c */ public class IconHandler { /** Creates a new instance of IconHandler */ public IconHandler() {} protected static ImageIcon createImageIcon(String path, Class<T> class) { URL imgURL = class.getResource(path); if (imgURL != null) { return new ImageIcon(imgUR...

Call for Papers: WORLDCOMP'07, Las Vegas, June 25-28, Conferences in Computer Science, Computer Engineering, and Applied Computing
Call For Papers - Deadline: May 1, 2007 WORLDCOMP'07 The 2007 World Congress in Computer Science, Computer Engineering, and Applied Computing Date and Location: June 25-28, 2007, Las Vegas, USA http://www.worldacademyofscience.org/worldcomp07/ws You are invited to submit a paper (see instructions below). WORLDCOMP'07 is composed of a number of tracks (joint conferences, tutorials, and workshops); all will be held simultaneously, same location and dates: June 25-28, 2007. See http://www.worldacade...

Call for Papers: WORLDCOMP'09: conferences in computer science, computer engineering, and applied computing, USA, July 13-16, 2009
Dear Colleagues: I would appreciate if you would share the announcement below with those who might be interested. Best regards, A. M. G. Solo Publicity Chair, WORLDCOMP'09 ----------------------------- CALL FOR PAPERS and Call For Workshop/Session Proposals WORLDCOMP'09 The 2009 World Congress in Computer Science, Computer Engineering, and Applied Computing July 13-16, 2009, Las Vegas, USA (composed of 22 Joint Conferences) You are invit...

Last CFP: WORLDCOMP'09 (Computer Science, Computer Engineering, and Applied Computing Conferences), USA, Submission Deadline: Feb. 25, 2009
CALL FOR PAPERS ================= Paper Submission Deadline: February 25, 2009 WORLDCOMP'09 The 2009 World Congress in Computer Science, Computer Engineering, & Applied Computing Date and Location: July 13-16, 2009, Las Vegas, USA http://www.world-academy-of-science.org You are invited to submit a paper; see below for submission instructions. All accepted papers will be published in the respective conference proceedings (in printed books/proceedings). WORL...

Last Call For Papers: WORLDCOMP'09 (Computer Science, Computer Engineering, and Applied Computing Conferences), USA, Submission Deadline: Feb. 25, 2009
CALL FOR PAPERS ================= Paper Submission Deadline: February 25, 2009 WORLDCOMP'09 The 2009 World Congress in Computer Science, Computer Engineering, & Applied Computing Date and Location: July 13-16, 2009, Las Vegas, USA http://www.world-academy-of-science.org You are invited to submit a paper; see below for submission instructions. All accepted papers will be published in the respective conference proceedings (in printed books/proceedings). WORL...

Last Call For Papers: WORLDCOMP'09 (Computer Science, Computer Engineering, and Applied Computing Conferences), USA, Submission Deadline: Feb. 25, 2009 #3
CALL FOR PAPERS ================= Paper Submission Deadline: February 25, 2009 WORLDCOMP'09 The 2009 World Congress in Computer Science, Computer Engineering, & Applied Computing Date and Location: July 13-16, 2009, Las Vegas, USA http://www.world-academy-of-science.org You are invited to submit a paper; see below for submission instructions. All accepted papers will be published in the respective conference proceedings (in printed books/proceedings). WORL...

Computer.
This site is dedicated to computers.It has lots and lots about computer related articles. Please visit.http://yourstuffs.com/main/ ...

Is THIS your computer?
http://content.techrepublic.com.com/2346-10878_11-6064.html Dirty computers: Revenge of the dust bunnies I've had a couple at work that were just about this bad, had to take them outside for a cleaning. My home boxes get opened too often to accumulate much dust. I'd like to see one of Greycloud's and Ian's VMS machines. I once worked for a guy who smoked like a chimney. His keyboard keys were blackened, and the inside of the computer had a lot of ashes in it. -- I had only one nerve left, and -dang- if you didn't git on it! Linonut wrote: > http://con...

computer.
This site is dedicated to computers.It has lots and lots about computer related articles. Please visit.http://yourstuffs.com/main/ ...

Computers
Get your Space at Pishnut Space.. GET YOUR PROFILE.....start a Computer Group or just join a group...Brand New... Groups, clubs, blogs and much, much more and all for free!! Send free ecards to family and friends http://www.pishnut.com ...

Computer
This site is dedicated to computers.It has lots and lots about computer related articles. Please visit.http://yourstuffs.com/main/ ...

computers
I think computers are cool In article <1174493959.499482.117630@n59g2000hsh.googlegroups.com>, bigzforlife@hotmail.com wrote: > I think computers are cool They will be one day, for sure. -- W. Oates On Mar 21, 2:49 pm, Warren Oates <warren.oa...@gmail.com> wrote: > In article <1174493959.499482.117...@n59g2000hsh.googlegroups.com>, > > bigzforl...@hotmail.com wrote: > > I think computers are cool > > They will be one day, for sure. > -- > W. Oates yep. ...