The Oracle Solaris OS is an internationalized operating system based on the latest international standards, such as Unicode 6.0. Users around the world can work with the system in their language and with their regional preferences. Oracle Solaris includes support for over 60 languages in about 100 different territories, totalling about 250 different locales. About 140 locales are based on Unicode, and support for various legacy locales based on ISO8859, EUC, and other codesets is still available. Unicode and legacy locales are described in detail in Chapter 2, Unicode and UTF-8 Locale Support. The following sections provide an overview of internationalization and localization, and explains the concept of locales.