Abstract: A data processing system comprising: a first storage device which stores, as input data, divisional data which is divided into a plurality of sets of the same type of data, each set having a respective size; a child job generation unit which, when the plurality of sets of data have been stored in the first storage device, generates child jobs on the basis of a parent job for processing the plurality of sets of data; a child job activation unit which activates the child jobs generated by the child job generation unit; and a second storage device which stores sets of output data resulting from the execution of the child jobs, each set of output data corresponding to one of the plurality of sets of data.

Abstract: In a fastening device, to an impact wrench body 2 of an impact wrench 1 a jig holder 5 is detachably fitted. To this jig holder 5 a socket integrated type whirl-stop jig 6 is detachably fitted. The socket integrated type whirl-stop jig 6 is constituted by a whirl-stop jig body 7 which is detachably fitted to a jig holder 5, a socket 8 which is rotatably supported on the jig body 7, and a coupling member 13. The socket 8 and the coupling member 13 are connected to be relatively movable in an axial direction and rotatable in one-piece with each other. The coupling member 13 is connected with the rotary shaft 20 of the impact wrench 1, and a fastener 28 is engaged with the socket 8 to be tightened to the screw 37 of the rotary shaft 36 to which the clutch inner part 33 is fitted. The whirl-stop jig body 7 has a one-piece whirl-stop part 32, which is engaged with the rib 34 of the clutch inner part 33, to whirl-stop the clutch inner part 33.