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1) Input Methods
An input method is a tool in either an operating system or a software program that enables the user of a computing device to use the keyboard to type characters that are not represented on the keypad of that particular device. This method is frequently used for inputting characters from a language with a different alphabet and for enabling letters to be typed with a numerical keyboard.
A Unicode font includes characters from the Universal Coded Character Set (UCS)—a comprehensive set of characters and glyphs from multiple languages—encoded in a way that ensures those characters appear the same across platforms and systems.