Some keyboard wanted direct input of unicode characters in the storage sequence. Unicode Invented some special character like O-kar Ou-kar and finally determined that the position of all characters are after main character. But in Unicode Bangla is not stored in writing sequence. At best a set of character is supposed to be replaced by little different shape. In case or Roman, hangul or even arabic, there is no necessity of Changing position of sequence of character. Whatever it is arrival sequence of character is not differed although some group of character is changed. Unicode generally don't care how a character is written or spoken, it just simplifies the repetition by normalization of all glyphs. So during processing of Kars Chandrabindu has to be considered. For example Cha(n)D is writeen as Cha Chandra-bindu A-kar Da. Another difference situation happens with Nasal vowel Chandra bindu. While writing we write Ref after completion some character or conjuncts.
The last issue I mentioned earlier that Ref is pretty surprising. When we utter KOn, we dictate Ka O-kar Na but in the similar fashion we write E-kar Ka A-kar Na. I surprise why we did not have! O kar is composed of two characters E-kar and A-kar. The problem is bigger when some Kar has no separate shape for them. So when we write Kemon, we speak Ka E-kar Ma O Na. In writing pen you could write some character and later add some special character before or top of that character! Bangla Kars are spoken after main characters or conjucts (which are practically as if single characters). What I can say is "Keyboard is not as flexible as Fountain pen". In addition to that problem of conjucts, which could be solved by normalizing these characters, the major problem lies in some Half form of characters which are very surprising in Nature. Yes thats not only our issues, its problem for Arabic, its problem for thai. While dealing with Bangla characters huge numbers of conjuncts (or juktakkhor) becomes the main problem. Difference between Writing style and Dictation style
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