Have an existing PS/2 Keyboard or Mouse & don`t have any PS/2 ports on your New PC or Laptop? The USB (Universal Serial Bus)-PS/2 is totally Plug n Play & allows any PS/2 device to work with USB1.1 or USB2.0 ports on most Operating Systems including:- Windows (r) 98/ME/2000/XP MAC OS (r) LINUX or UNIX