1. A Sub Sequence Net (SN), comprising: an SN including N+1 branch programs which are run in parallel respectively running on N+1 computers including a Sub SN calling device and more than one distributed data tokens; wherein each of the distributed data tokens comprises a consistency token instruction, a source data token instruction and multiple target data token instructions, and each of the 1 st to N th branch programs is composed by one or more source data token instructions and one or more of the target data token instructions, the N+1 th branch program is a consistency program which is composed by the consistency token instructions; wherein each of the N+1 branch programs includes a return instruction, and wherein N is a positive integer; and wherein a calling instruction of the Sub SN is a single machine SN calling instruction; the call instruction calls the Sub SN by activating the Sub SN calling device.