From: "Cédric Foll" Date: 2003-01-06T22:20:37+09:00 Subject: Re: the operating system release You can use the PLATFORM constant to get the OS: irb(main):001:0> PLATFORM "i586-mswin32" If you want to get the version of the OS, under linux (and perhaps other unix) you can call the command "uname". os_version = `uname -a` regards