Size of MPI

But already MPI-1 offers a great wealth of functions and MPI-2 offers many more.

`MPI_ABORT`	`MPI_ADDRESS`	`MPI_ALLGATHER`	`MPI_ALLGATHERV`
`MPI_ALLREDUCE`	`MPI_ALLTOALL`	`MPI_ALLTOALLV`	`MPI_ATTR_DELETE`
`MPI_ATTR_GET`	`MPI_ATTR_PUT`	`MPI_BARRIER`	`MPI_BCAST`
`MPI_BSEND`	`MPI_BSEND_INIT`	`MPI_BUFFER_ATTACH`	`MPI_BUFFER_DETACH`
`MPI_CANCEL`	`MPI_CARTDIM_GET`	`MPI_CART_COORDS`	`MPI_CART_CREATE`
`MPI_CART_GET`	`MPI_CART_MAP`	`MPI_CART_RANK`	`MPI_CART_SHIFT`
`MPI_CART_SUB`	`MPI_COMM_COMPARE`	`MPI_COMM_CREATE`	`MPI_COMM_DUP`
`MPI_COMM_FREE`	`MPI_COMM_GROUP`	`MPI_COMM_RANK`	`MPI_COMM_REMOTE_GROUP`
`MPI_COMM_REMOTE_SIZE`	`MPI_COMM_SIZE`	`MPI_COMM_SPLIT`	`MPI_COMM_TEST_INTER`
`MPI_DIMS_CREATE`	`MPI_ERRHANDLER_CREATE`	`MPI_ERRHANDLER_FREE`	`MPI_ERRHANDLER_GET`
`MPI_ERRHANDLER_SET`	`MPI_ERROR_CLASS`	`MPI_ERROR_STRING`	`MPI_FINALIZE`
`MPI_GATHER`	`MPI_GATHERV`	`MPI_GET_COUNT`	`MPI_GET_ELEMENTS`
`MPI_GET_PROCESSOR_NAME`	`MPI_GRAPHDIMS_GET`	`MPI_GRAPH_CREATE`	`MPI_GRAPH_GET`
`MPI_GRAPH_MAP`	`MPI_GRAPH_NEIGHBORS`	`MPI_GRAPH_NEIGHBORS_COUNT`	`MPI_GROUP_COMPARE`
`MPI_GROUP_DIFFERENCE`	`MPI_GROUP_EXCL`	`MPI_GROUP_FREE`	`MPI_GROUP_INCL`
`MPI_GROUP_INTERSECTION`	`MPI_GROUP_RANGE_EXCL`	`MPI_GROUP_RANGE_INCL`	`MPI_GROUP_RANK`
`MPI_GROUP_SIZE`	`MPI_GROUP_TRANSLATE_RANKS`	`MPI_GROUP_UNION`	`MPI_IBSEND`
`MPI_INIT`	`MPI_INITIALIZED`	`MPI_INTERCOMM_CREATE`	`MPI_INTERCOMM_MERGE`
`MPI_IPROBE`	`MPI_IRECV`	`MPI_IRSEND`	`MPI_ISEND`
`MPI_ISSEND`	`MPI_KEYVAL_CREATE`	`MPI_KEYVAL_FREE`	`MPI_OP_CREATE`
`MPI_OP_FREE`	`MPI_PACK`	`MPI_PACK_SIZE`	`MPI_PCONTROL`
`MPI_PROBE`	`MPI_RECV`	`MPI_RECV_INIT`	`MPI_REDUCE`
`MPI_REDUCE_SCATTER`	`MPI_REQUEST_FREE`	`MPI_RSEND`	`MPI_RSEND_INIT`
`MPI_SCAN`	`MPI_SCATTER`	`MPI_SCATTERV`	`MPI_SEND`
`MPI_SENDRECV`	`MPI_SENDRECV_REPLACE`	`MPI_SEND_INIT`	`MPI_SSEND`
`MPI_SSEND_INIT`	`MPI_START`	`MPI_STARTALL`	`MPI_TEST`
`MPI_TESTALL`	`MPI_TESTANY`	`MPI_TESTSOME`	`MPI_TEST_CANCELLED`
`MPI_TOPO_TEST`	`MPI_TYPE_COMMIT`	`MPI_TYPE_CONTIGUOUS`	`MPI_TYPE_EXTENT`
`MPI_TYPE_FREE`	`MPI_TYPE_HINDEXED`	`MPI_TYPE_HVECTOR`	`MPI_TYPE_INDEXED`
`MPI_TYPE_LB`	`MPI_TYPE_SIZE`	`MPI_TYPE_STRUCT`	`MPI_TYPE_UB`
`MPI_TYPE_VECTOR`	`MPI_UNPACK`	`MPI_WAIT`	`MPI_WAITALL`
`MPI_WAITANY`	`MPI_WAITSOME`	`MPI_WTICK`	`MPI_WTIME`

`MPI_Init`	Initialise MPI
`MPI_Comm_size`	Find out how many processes there are
`MPI_Comm_rank`	Find out which process I am
`MPI_Send`	Send a message
`MPI_Recv`	Receive a message
`MPI_FINALIZE`	Terminate MPI