This keyboard is designed for the Tamil language and based on the Tamil typewriter layout. The keyboard is designed for users who are familiar with both this layout and the Tamil script, and is intended for use with a normal QWERTY (English) keyboard. This keyboard layout is based on the Tamil typewriter, with separate keys for consonants, vowels and vowel components. Most of the characters used in Tamil are combinations of consonants and vowels, and these do not appear on the keyboard.
Instead, the appropriate vowel component is typed after the consonant. For example, the standalone vowel இ is entered by typing ,, but in combination with a consonant, the ி component (p key) is usually typed instead, after the consonant, and the consonant-vowel combinant will be displayed. Pressing Backspace once will delete only the vowel component, so the character displayed on the screen will change back to the consonant, and change again if a different component is typed.
Grantha letters, which are used for typing Sanskrit, appear on the keyboard and are treated as normal consonants. The visible keyboard layout consists of the eighteen consonants க ங ச ஞ ட ண த ந ப ம ய ர ல வ ழ ள ற ன, the five Grantha consonants and SRiiஸ ஷ ஜ ஹ க்ஷ ஸ்ரீ, eleven vowels அ ஆ இ ஈ உ ஊ எ ஏ ஐ ஒ ஓ, a range of vowel components and combinants characters, and the Pulli ் and Aytham ஃ marks, as well as various punctuation marks.