How Many Punctuation Marks !!

سعادت

تکنیکی معاون
Is anybody aware of the punctuation mark that cannot be typed by a computer keyboard?

There are loads of them! (Depedning on the keyboard layout that you're using, of course.)​
The Unicode standard defines a huge number of "punctuation characters" scattered around different code point ranges (take a look at this reference page, under "Punctuation, XYZ"). Wikipedia's article on punctuation has a list of some of the most common punctuation marks for Latin scripts; you can take a look and see for yourself the ones that cannot be typed.​
An example: the "curly" quotes (“”), essential for good typography, cannot be typed with a regular QWERTY layout -- the quotes that you see on a QWERTY layout are called "typewriter quotes". Same is the case with different types of dashes. You can, of course, use the characters found on a standard QWERTY layout to "approximate" a certain pronunciation mark, but that will not be sound from a strict typographic perspective.​
 

سعادت

تکنیکی معاون
By the way...

An example: the "curly" quotes (“”), essential for good typography, cannot be typed with a regular QWERTY layout -- the quotes that you see on a QWERTY layout are called "typewriter quotes". [...] You can, of course, use the characters found on a standard QWERTY layout to "approximate" a certain pronunciation mark, but that will not be sound from a strict typographic perspective.​
I should clarify one thing: grammatically, use of a typewrite quote is correct and completely fine. To take an example from the Oxford website:

Typewriter single quotes: What does 'integrated circuit' mean?
Curly single quotes: What does ‘integrated circuit’ mean?
Both are correct in terms of English grammar, but the sentence with typewriter quotes will annoy the heck out of a passionate typographer.​
 
Top