To understand what ASCII is, in any MS Windows system, within Notepad, try keystroke combination ALT+[NumPad numbers upto 127]. You will discover that numbers between ALT+48 and ALT+57 are digits we use. Numbers between ALT+65 and ALT+90 are capital alphabets. And finally, numbers between ALT+97 and ALT+122 are small alphabets. These are the characters produced with ASCII is an encoding system using 7 bits to represent a character. In scripts like Japanese, Devnagari, etc the number of characters of all scripts is so high that you cannot fit all of them within about 128 representations (using just one byte=8 bits). Unicode system uses 2 bytes (16 bits) for representing characters and hence allows to accommodate wider range of scripts.

Hope this proves to be useful.
With best regards,
Siddhant Chothe
Skype/Facebook/Twitter: sidnc86
Website: http://www.techvision.net.in

"I am the imperfect perfectionist perfectionizing the imperfect in me!"


--------------------------------------------------
From: "Him Prasad Gautam" <drishtibac...@gmail.com>
Sent: Saturday, July 26, 2014 9:20 AM
To: "AccessIndia: a list for discussing accessibility and issues concerningthe disabled." <accessindia@accessindia.org.in> Subject: Re: [AI] what is uniCode and why screen reader work only foruniCode texts?

hi,
Sorry I do not have.
I belong to a different profession than computer/software technology.
It is my off hour work.
I have not formally learn computer from any one half an hour in my life.
I am self taught person, no note, see the help file of the system
which you wish to learn.




On 7/25/14, Ganesh Babu <jsspda.gan...@gmail.com> wrote:
I need C programming notes

On 7/25/14, Him Prasad Gautam <drishtibac...@gmail.com> wrote:
hi,
Soft copy,  but about what?
What do you need?


On 7/24/14, Ganesh Babu <jsspda.gan...@gmail.com> wrote:
Dear sir,
I forget to tell you, PL send me soft copy

On 7/24/14, Him Prasad Gautam <drishtibac...@gmail.com> wrote:
Hi,
There are some reasons:
1. we are blind by eyes, they are blind by mind.
2. In this world, a man quickly adopts bad things, but could not
abandon
it.
3. A man is always reluctant to good cause and is hesitant to practice
right things.
4. Perhaps it is god's fault, he made human being so...
traditional system of character coding is far and far junior than uni
code.
Mind that the world is govern by virtual power but not by ground
reality.



On 7/24/14, Bhavya shah <bhavya.shah...@gmail.com> wrote:
Hi.
I asked this on another thread on the same topic but thought to write
it to this thread just  in case.
Why do sighted people use ASCII more often than Unicode and why do
they use ASCII anyways? Are there any advantages of ASCII over
Unicode?
ASCII & Unicode fall under the group of encoding systems, right?
What does ASCII stand for?

On 7/24/14, Siddalingeshwar Ingalagi <ingalagisi...@gmail.com> wrote:
ok sir. I understood. Thanks for explaining.

On 7/24/14, Him Prasad Gautam <drishtibac...@gmail.com> wrote:
hi,
question one:. What is difference between  ascii anci
Answer:
For general concept, they both fall under the category as one group
element have different identification number but different group
will
use the same number with repeating of those numbers which were
already
used by another group.
Question 2: Difference between unicode UTF8 and UTF16?
Answer:
I earlier have  explained  that letters converted in numbers,
numbers
in zero and one. The zero is taken as switch off no supply of
electricity) and one is converted as switch on supply electricity).
Finally every things is converted into how many times on the switch
and how many time off the switch.
Take a real example:
65 is the code number of the English capital letter A.
If we convert the number 65 into one and zero (binary number) it
becomes  1000001
Count the number of zero and one here.
There is one at first and at last and rest are zero.
The total digit is seven.
It means switch the first one, switch off the second, third,
fourth,fifth, sixth and switch on the seventh. That is capital A.
This is only background information for your question.
Then what is utf-8 and 16 etc.
This is the span of a binary number.
Take an example:
you can write one as
1
01
001
0001
00001
000001
What is the different among these numbers?
In value all they are one but in digits they are different.
 01 is two digit and 000001 is six digit.
Now go to back again.
each letter of each language of the world have an unique number
called
the uni Code.
English Capital has the code 65 but my Nepali ka has 2325.
if both letters converted into zero and one (binary number); A is 7
digit and my ka may have 12 digit and perhaps your Kannada ka may
have
sixteen digit.
Now if we want write all number of equal digit say sixteen; we have
to
add nine zeros in front of English A and four in front of my ka but
no
thing to add in front of your ka.
In brief, it is a process of maintaining the number with same digit.
If it is smaller than the set span, zero are added in front of it
but
keeping the value same.
In conclusion, The bit expresses the length of digit.
question three: what is font convert?
Answer:
Basically it is not a font convert but converting the code number of
a
letter.
Remember my earlier example:
English 1, 2, 3, 4,  5, etc.
Russian 1, 2, 3, 4, 5, etc.
It is ASCII system.
In the same example I have written:
English: 1, 2, 3, 4, 5,...
Russian 100, 101, 102, 103, etc
It is Uni Code system.

Now Font convert means converting ASCII into uni Code numbering
system.
In the above example:
Converting Russian 1 into 100, 2 into 101, 3 into 102 etc. etc.
Making the ASCII code letter into uni Code letter
Hence The word Font convert is meaning less from real sense.

On 7/24/14, Renuka Warriar Edakkunni <eren...@gmail.com> wrote:
Superb explanation.

Renuka.

On 7/24/14, Siddalingeshwar Ingalagi <ingalagisi...@gmail.com>
wrote:
hi sir, nice explaination. What is difference between ascii anci
and
unicode UTF8 and UTF16? and what is font convert?

On 7/23/14, Him Prasad Gautam <drishtibac...@gmail.com> wrote:
Hi list,
Many persons usually ask me what is unicode?
Why screen reader work only in Unicode?
Many VI fellows had requested me to make a system which may read
non-uniCode letters which is not possible.
They often complain that sited persons use non-uniCode system
which
they have to access.
Here is a reply:

Let you be clear:
1. computer only knows every thing in number, no letter, word, or
order. For example, if you press enter key, computer understand
it
as
13. number of key. like your roll number in school.
2. It does not recognize anything except numbers.
3. Though Computer knows only the numbers; the number must be
either
zero or one. two, three , four is not understood by it.
4. The two, three, four, ten, hundred or billion etc is converted
into
a different number that contain zero and one which called binary. 6. The binary number which contains only zero and one is taken as
follows:
zero means(switch off (no electric supply).
1 meansswitch on ( electric supply.).
7. That means computer does switch on and off only, it does not
do
any
thing more.
8. The processor speed expressed in hertz means how many times
can
it
do the switch on and off in one second.
9. A human being takes few second to on or off a switch, computer
does
the same work many billions times in one second.
Now, perhaps you may have understood:
1. Computer does not recognize any letters.
2. Instead a letter name like a, b, c, a number of that letter
must
be
given to it. Like you are called by your roll number by a
teacher,
or
an immigrant officer called you by your passport number or some
one
refered you by your id number but not by your name.
3. Hope you conclude that in computer letters are dealt in
numbers
only but not by their name.
Now the first question begins:
How the letters are given numbers?
What number is given for English alphabet a or  for b or  for c
or
for
z or for ka/kha of Hindi, or for alif/bay  of urdu?
The numbering system of all letter of all languages of the world
is
called unicode.
For example:
Government decided to allocate a id number to all of Indian
citizen.
Now the id number can be given in either way:
First method:
Bengal: 1, 2, 3, 4, 5 ....
Orissa: 1, 2, 3, 4, 5, ....
Gujarat:1, 2, 3, 4,5,
Kerala: 1, 2, 3, 4, 5....
In this method, the id number within a state is not repeated but
the
same id number holder is found in another state.
Second method:
Do not repeat the id number in each state. Allocate an unique
number
for an Indian citizen.
Now come to the letter numbering system:
This is an example:
English letter: 1, 2, 3, 4, 5,
Russian letter: 1, 2, 3, 4, 5
Hindi letter: 1, 2, 3, 4, 5, ....
Punjabi letter: 1, 2, 3, 4, 5, ...
Chinese letter: 1, 2, 3, 4, 5
This method of giving the number is called ASCII system.
Where the letter number is repeated.
Second way:
English lettter: 1, 2, 3, 4, 5, ... upto 99
Russian letter: 100, 101, 102, 103, 104...upto 199
Hindi letter: 200, 201, 202, 203, 204... up to 299
Punjabi letter: 300, 301, 302, 303, ... up to 399.
Chinese letter: 400, 401, 402, 403, 404
In this method, the letter numbers is not repeated! in different
language.
This is the Unicode system of coding.
Now the final reply:
It is already cleared that computer recognizes a letter by its
code
number; if the Unicode system is followed, it recognizes the
exact
letter because there is no repeating of the letter code number.
If the letters coded in ASCII encoding, the repeat of number
takes
places and computer does not recognizes which language or letter
it
belongs.
Take an example:
if you went to a school and asked the headmaster about the
performance
of your kid having roll number ten; Can the headmaster exactly
judge
which is the student?
Definitely not, because there are many students having roll
number
ten.
If the school have a roll number system as in unicode; he can
immediately know who is the kid because in Unicode there will be
only
one student having roll number ten in the school.
 Same case happens to screen reader to recognize the exact
letter.
That is why It recognizes if in Unicode but does not if in ASCII
code.

Him Prasad Gautam
Kathmandu, Nepal



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--
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--
Best Regards
Bhavya Shah
E-mail Address :- bhavya.shah...@gmail.com
Skype -> bhavya.09



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