    [NAME]
    ALL.module.core.sys

    [TITLE]
    System Dependent Core Functions

    [DESCRIPTION]

       1  shell( command :string )
       2  popen( cmd :string, mode :string )=>io::stream
       3  sleep( seconds :float )
       4  exit( code=0 )
       5  clock()=>float
       6  ctime( time=0 )=>tuple<year:int,month:int,day:int,wday:int,hour:int,minute:int,second:int>
       7  ctimef( time=0, format='%Y-%M-%D, %H:%I:%S', names : map<string,list<string>> = {=>} )=>string
       8  time(  )=>int
       9  time( tm : tuple<year:int,month:int,day:int,wday:int,hour:int,minute:int,second:int> )=>int
      10  setlocale( category: enum<all,collate,ctype,monetary,numeric,time> = $all, locale = '' )=>string
      11  getenv( name: string )=>string
      12  putenv( name: string, value = '' )