An object that represents an array of Unicode characters ( UniChar ) along with a count of the number of characters. Unicode-based strings in Core Foundation provide a solid basis for internationalising the software you develop. Unicode makes it possible to develop and localise a single version of an application for users who speak most of the world’s written languages, including Russian (Cyrillic), Arabic, Chinese, and Japanese. Although conceptually CFString objects store strings as arrays of Unicode characters, in practise they often store them more efficiently. The memory a CFString object requires is typically about the same or even less than that required by a simple UniChar array.