Abstract: According to one embodiment, an electronic device includes a receiver, a transmitter, a management module, and an informing module. The receiver receives a purchase instruction from a user. The transmitter transmits the received purchase instruction to a server via a network. The management module manages a purchase history of the user. The informing module determines, upon receiving the purchase instruction from the user, whether the received purchase instruction satisfies a predetermined condition based on a purchase history of a predetermined period, and sends a message to the user if the purchase instruction satisfies the predetermined condition.

Abstract: According to one embodiment, an electronic device includes a receiver, a transmitter, a management module, and an informing module. The receiver receives a purchase instruction from a user. The transmitter transmits the received purchase instruction to a server via a network. The management module manages a purchase history of the user. The informing module determines, upon receiving the purchase instruction from the user, whether the received purchase instruction satisfies a predetermined condition based on a purchase history of a predetermined period, and sends a message to the user if the purchase instruction satisfies the predetermined condition.

Abstract: According to one embodiment, an electronic apparatus includes: a main body that has a bearing hole having a first retaining portion and a second retaining portion; a sub module that has a shaft rotatably coupling with the bearing hole so that the sub module moves between a first position and a second position; and a detent spring that is coupled with the shaft to keep the sub module at the first position and at the second position, the detent spring having a third retaining portion, wherein the third retaining portion couples with the first retaining portion when the sub module is kept at the first position, and wherein the third retaining portion couples with the second retaining portion when the sub module is kept at the second position.

Abstract: According to one embodiment, an electronic apparatus includes: a main body that has a bearing hole having a first retaining portion and a second retaining portion; a sub module that has a shaft rotatably coupling with the bearing hole so that the sub module moves between a first position and a second position; and a detent spring that is coupled with the shaft to keep the sub module at the first position and at the second position, the detent spring having a third retaining portion, wherein the third retaining portion couples with the first retaining portion when the sub module is kept at the first position, and wherein the third retaining portion couples with the second retaining portion when the sub module is kept at the second position.