what are the methods of data entry?
['1) A phonetic mapping method.', '2) A transliteration based data entry method.', '4) Tamilnet99 Keyboard mapping.', 'Phonetic approach to Data Entry.', 'Consonants.', 'Special Consonants. There are four special consonants. ... ', 'Standard punctuation marks.', 'Typing in arbitrary conjuncts using half letters.']