PURPOSE: To refer to a pointer at a high speed and then to carry out the parallel processing at a high speed by writing the pointer of each static data area into each dynamic data area when the dynamic data proper to each sled is generated.

CONSTITUTION: An OS1 reads the pointers PA and PB of the static data areas DA and DB out of the control information K concurrently with production of the sleds SA and SB and the stacks A and B of dynamic data areas proper to the sleds SA and SB. Then the pointers PA and PB are written into the produced areas A and B. Thus the parallel processing speed is increased since only both pointers PA and PB are read out of the areas A and B for execution of accesses to the areas DA and DB respectively.