1. An operation sequencer comprising: (a) memory means for reading, writing and storing digital information, including digital operation packets divided into a successor address portion having at least one address, a specification portion for storing the specification of an operation to be performed, a predecessor state portion for storing the current performance state of predecessor operations required to be performed before the current operation can be performed, and a restore state portion for storing the original state of the predecessor state portion, (b) operational means having at least one operational unit, connected to the memory means for receiving at least one specification portion of at least one digital operation packet, and for performing the operation; (c) update and restore means, connected to the memory means, for receiving and updating the predecessor state portion until at least one predetermined state is reached, and for receiving the restore portion and for writing into the predecessor state portion the digital state in the restore state portion when the predetermined state is reached; (d) operation address means for receiving the addresses of operations to be performed and for causing the digital operation packet located in the memory means at the address of a selected one of the addresses of operations to be read out and transferred to the operational means; (e) successor address means, for receiving the address from the successor address portion of the digital operation packet and for causing the predecessor state portion and the restore state portion at the successor address to be read out and for the update and restore means to operate, and if the predetermined state is reached, to again transmit the successor address to the operation address means as an operation to be performed; and (f) control means, operatively connected to the memory means, the operational means, the update and restore means, the operation address means and the successor address means, for providing gating and sequencing of the sequencer.