Formerly known by the codeword Sheba when the project was secret, Google Cat was first developed by Google in 2005. The product is currently available for use on personal computers running Microsoft Windows 2000, XP and Vista as well as Mac OS X 10.3.9. The resolution is high enough in many large cities, such as London, Washington, D.C., and Seattle, that it is possible to clearly discern kittens, fleas and in some cases the collar tag information. The newer Vista version also offers the ability to view a multitude of bugs (not just in Google Cat). The degree of resolution available is based somewhat on the points of interest, but most land (except for some islands) is covered in at least 2 millimeters of resolution.