By all systems I mean Linux, Mac OSX, Mac OS9 and Windows.

At home we try to work on our English all the time and we buy books to help us improve our language skills. Ideally the book should have a CD included with interactive exercises and pronunciation. All the CDs I bought before worked only on Windows systems and sometimes I was able to run them under Wine.

We bought today "Cutting Edge" Student's Book with CD included. To my big surprise when I looked at system requirements I saw: Windows 98/2000/ME/XP, Mac OSX and Linux GNU/Linux Kernel 2.6.

Really nice move. The whole application is in Flash so it should work fine on any system supporting the Flash. The CD includes Flash player for these 3 systems and when you run the application you may even not notice that it is a Flash program.