TYPO3 Core

In file: typo3/sysext/core/Classes/Utility/ClassNamingUtility.php (at the top)

/**
 * Several functions related to naming and convertions of names
 * such as translation between Repository and Model names or
 * exploding an objectControllerName into pieces
 *
 * @api
 */
class ClassNamingUtility {
  [...]
}

First sentence should read: "Several functions related to naming and conversions of..." (instead of "convertions").
Note: this is a new class, introduced with TYPO3 CMS 6.1.