val argv : string array
(** The command line arguments given to the process.
   The first element is the command name used to invoke the program.
   The following elements are the command-line arguments
   given to the program. *)

val executable_name : string
(** The name of the file containing the executable currently running. *)

val interactive : bool ref
(** This reference is initially set to [false] in standalone
   programs and to [true] if the code is being executed under
   the interactive toplevel system [ocaml]. *)

val os_type : string
(** Operating system currently executing the Caml program. One of
-  ["Unix"] (for all Unix versions, including Linux and Mac OS X),
-  ["Win32"] (for MS-Windows, OCaml compiled with MSVC++ or Mingw),
-  ["Cygwin"] (for MS-Windows, OCaml compiled with Cygwin). *)

val word_size : int
(** Size of one word on the machine currently executing the Caml
   program, in bits: 32 or 64. *)

val max_string_length : int
(** Maximum length of a string. *)

val max_array_length : int
(** Maximum length of a normal array.  The maximum length of a float
    array is [max_array_length/2] on 32-bit machines and
    [max_array_length] on 64-bit machines. *)

val ocaml_version : string
(** [ocaml_version] is the version of Objective Caml.
    It is a string of the form ["major.minor[.patchlevel][+additional-info]"],
    where [major], [minor], and [patchlevel] are integers, and
    [additional-info] is an arbitrary string. The [[.patchlevel]] and
    [[+additional-info]] parts may be absent. *)