The present invention generally is a method of managing the process of a plurality of transactions through two or more applications in a business transaction environment. The logic IC selectively switches connections of terminals thereof with the memory and the controller for communication therewith upon receiving a communication signal from the camera body. The semiconductor die is provided with a front side defining a sealing area, and a first solder sealing ring pad formed on that front side. Further, on a plain surface facing the outside of the pole-shaped base member 10a, a second antenna element 12 is formed also by circularly patterning a metal conductor layer at the side of a top of the first antenna element 11 with a predetermined space being kept between the top of the first antenna element 11 and the second antenna element 12. A system for the foregoing method is also disclosed.