code: public static OSFamily getOSFamily() {
  		String name = System.getProperty("os.name").toLowerCase(Locale.US);
  		if (name.contains("windows")) {
  			if (name.contains("95") ||
  				name.contains("98") ||
  				name.contains("me") ||
  				name.contains("ce"))
  				return OSFamily.win9x;
  			return OSFamily.windows;
  		}
  		if (name.contains("os/2"))
  			return OSFamily.os2;
  		if (name.contains("netware"))
  			return OSFamily.netware;
  		String sep = System.getProperty("path.separator");
  		if (sep.equals(";"))
  			return OSFamily.dos;
  		if (name.contains("nonstop_kernel"))
  			return OSFamily.tandem;
  		if (name.contains("openvms"))
  			return OSFamily.openvms;
  		if (sep.equals(":") && (!name.contains("mac") || name.endsWith("x")))
  			return OSFamily.unix;
  		if (name.contains("mac"))
  			return OSFamily.mac;
  		if (name.contains("z/os") || name.contains("os/390"))
  			return OSFamily.zos;
  		if (name.contains("os/400"))
  			return OSFamily.os400;
  		return null;
  	}
docs: Returns the type of operating system.