There is provided an intake air amount control system for an internal combustion engine, which controls the amount of intake air by executing both cam phase control and valve lift control, and is capable of enhancing response and accuracy of the intake air amount control, while avoiding interaction between the cam phase control and the valve lift control. A digital wallet application receives a customer identification from a digital wallet system hosting a customer account. Further, according to different figures of different users, the mattress can be adjusted to a most appropriate sleeping posture for the users. Combination cells, a Boolean combination of two or more selected search cells, are also movable and contain a combine icon, hit count, and an expression field. , the words that occur close to this word.