Arg	Parsing of command line arguments.
Arith_flags
Arith_status	Flags that control rational arithmetic.
Array	Array operations.
ArrayLabels	Array operations.
Buffer	Extensible string buffers.
Callback	Registering Caml values with the C runtime.
CamlinternalMod
CamlinternalOO	Run-time support for objects and classes.
Char	Character operations.
Complex	Complex numbers.
Dbm	Interface to the NDBM database.
Digest	MD5 message digest.
Dynlink	Dynamic loading of bytecode object files.
Event	First-class synchronous communication.
Filename	Operations on file names.
Format	Pretty printing.
Gc	Memory management control and statistics; finalised values.
Genlex	A generic lexical analyzer.
Graphics	Machine-independent graphics primitives.
GraphicsX11	Additional graphics primitives for the X Windows system.
Hashtbl	Hash tables and hash functions.
Int32	32-bit integers.
Int64	64-bit integers.
Int_misc
Lazy	Deferred computations.
Lexing	The run-time library for lexers generated by `ocamllex`.
List	List operations.
ListLabels	List operations.
Map	Association tables over ordered types.
Marshal	Marshaling of data structures.
MoreLabels	Extra labeled libraries.
Mutex	Locks for mutual exclusion.
Nat
Nativeint	Processor-native integers.
Obj	Operations on internal representations of values.
Oo	Operations on objects
Parsing	The run-time library for parsers generated by `ocamlyacc`.
Pervasives	The initially opened module.
Printexc	Facilities for printing exceptions.
Printf	Formatted output functions.
Queue	First-in first-out queues.
Random	Pseudo-random number generators (PRNG).
Scanf	Formatted input functions.
Set	Sets over ordered types.
Sort	Sorting and merging lists.
Stack	Last-in first-out stacks.
StdLabels	Standard labeled libraries.
Str	Regular expressions and high-level string processing
Stream	Streams and parsers.
String	String operations.
StringLabels	String operations.
Sys	System interface.
Unix	Interface to the Unix system
Weak	Arrays of weak pointers and hash tables of weak pointers.