Keyboard is an input method for entering characters similar to a hardware keyboard.
Keyboard assists the user by providing list of words from the dictionary
that matches the user input. While typing if the user finds his desired word,
he can select that word from the list.
A mother is teaching English alphabets to her four-year-old son. So she opens Keyboard, enters some alphabets in Text Editor and shows him the different alphabets.
A College student is a very fast writer on Qtopia device. He just types few initial letters of a word and picks the desired word from given list.