Sophisticated kana to kanji converters (known collectively as input method editors, or IMEs), allow conversion of multiple kana words into kanji at once, freeing the user from having to do a conversion at each stage. The user can convert at any stage of input by pressing the space bar or henkan button, and the converter attempts to guess the correct division of words. Some IME programs display a brief definition of each word in order to help the user choose the correct kanji.