System is a module to retrieve some system informations.
var system = require('system')
An array containing a list of arguments on the command line given to the script. The first one (at index 0) is always the script name.
var numberOfArg = system.args.length;
var thirdArgument = system.args[2];
An object having information about the operating system. Here are its properties:
Always returns 0 (no Mozilla API to retrieve the PID)
Returns "slimerjs".