Abstract: An electronic communication device (ECD) includes a memory that stores software instructions; and a processor that executes the software instructions. When executed by the processor, the software instructions cause the ECD to: generate and send formatted inquiries and formatted instructions for virtual notes of a national digital currency to a central system that tracks all instances of virtual notes of the national digital currency; and receive responses to the formatted inquiries and confirmations of the formatted instructions from the central system if the formatted inquiries and formatted instructions comply with a predetermined format required by the central system to process the formatted inquiries and formatted instructions.

Abstract: A central system may track virtual notes of a digital currency involved in transactions so that current ownership of the virtual notes can be verified as a basis for authorizing transactions involving the virtual notes. The central system may create and maintain an electronic history for the virtual notes, and update the electronic history after each transaction.

Abstract: A multi-entity automated communications system includes a centralized system. The centralized system receives first communications from different first systems with a first application coordinated by the centralized system, and based on the received communications automatically communicates via second communications with a second system with a second application coordinated by the centralized system, and based on the first communications and the second communications, provides instructions to a third system to initiate transactions to pay users of the first systems.

Abstract: Multi-level network-based access is coordinated. Multiple downloadable first software applications configured to provide a first class of service are distributed over a communications network. Multiple downloadable second software applications configured to provide a second class of service are distributed over the communications network. A centralized computer system coordinates access between the first software applications and the second software applications, such that access between any of the first software applications and the second software applications is controlled by and through confirmation of the centralized computer system. Services on behalf of the first software applications are provided by the centralized computer system to the second software applications once access between a first software application and a second software application is confirmed.

Abstract: Multi-level network-based access is coordinated. Multiple downloadable first software applications configured to provide a first class of service are distributed over a communications network. Multiple downloadable second software applications configured to provide a second class of service are distributed over the communications network. A centralized computer system coordinates access between the first software applications and the second software applications, such that access between any of the first software applications and the second software applications is controlled by and through confirmation of the centralized computer system. Services on behalf of the first software applications are provided by the centralized computer system to the second software applications once access between a first software application and a second software application is confirmed.

Abstract: An engine piston is manufactured by assembling an outer shell, comprising a crown and tubular side wall in which a ring groove region and skirt are defined, with a plate-like mounting member and bonding them together by brazing or welding. The mounting member is located within the tubular side wall displaced axially from the crown and is bonded near, but displaced radially from, its centre to the crown and at its periphery to the side wall at the end of the ring groove region. The mounting member carries gudgeon pin boss means facing away from the crown. The outer shell is formed by extrusion or the like that permits minimal wall thickness and the bonded structure is of light weight but great strength and stiffness, particularly in the ring groove region. A combustion bowl formed in the crown facilitates bonding to the mounting member and defines with the mounting member an annular cooling chamber adjacent the ring groove region and crown.

Abstract: An engine piston is manufactured by assembling an outer shell, comprising a crown and tubular side wall in which a ring groove region and skirt are defined, with a plate-like mounting member and bonding them together by brazing or welding. The mounting member is located within the tubular side wall displaced axially from the crown and is bonded near, but displaced radially from, its centre to the crown and at its periphery to the side wall at the end of the ring groove region. The mounting member carries gudgeon pin boss means facing away from the crown. The outer shell is formed by extrusion or the like that permits minimal wall thickness and the bonded structure is of light weight but great strength and stiffness, particularly in the ring groove region. A combustion bowl formed in the crown facilitates bonding to the mounting member and defines with the mounting member an annular cooling chamber adjacent the ring groove region and crown.

Abstract: An engine piston is manufactured by assembling an outer shell, comprising a crown and tubular side wall in which a ring groove region and skirt are defined, with a plate-like mounting member and bonding them together by brazing or welding. The mounting member is located within the tubular side wall displaced axially from the crown and is bonded near, but displaced radially from, its centre to the crown and at its periphery to the side wall at the end of the ring groove region. The mounting member carries gudgeon pin boss means facing away from the crown. The outer shell is formed by extrusion or the like that permits minimal wall thickness and the bonded structure is of light weight but great strength and stiffness, particularly in the ring groove region. A combustion bowl formed in the crown facilitates bonding to the mounting member and defines with the mounting member an annular cooling chamber adjacent the ring groove region and crown.

Abstract: An engine piston is manufactured by assembling an outer shell, comprising a crown and tubular side wall in which a ring groove region and skirt are defined, with a plate-like mounting member and bonding them together by brazing or welding. The mounting member is located within the tubular side wall displaced axially from the crown and is bonded near, but displaced radially from, its centre to the crown and at its periphery to the side wall at the end of the ring groove region. The mounting member carries gudgeon pin boss means facing away from the crown. The outer shell is formed by extrusion or the like that permits minimal wall thickness and the bonded structure is of light weight but great strength and stiffness, particularly in the ring groove region. A combustion bowl formed in the crown facilitates bonding to the mounting member and defines with the mounting member an annular cooling chamber adjacent the ring groove region and crown.