Version 3.0 was released in 2002 with additional words from the "OED3" and software improvements. Version 3.1.1 (2007) added support for hard disk installation, so that the user does not have to insert the CD to use the dictionary. It has been reported that this version will work on operating systems other than Microsoft Windows, using emulation programs. Version 4.0 of the CD has been available since June 2009 and works with Windows 7 and Mac OS X (10.4 or later). This version uses the CD drive for installation, running only from the hard drive.