An adapter assembly for selectively interconnecting a surgical loading unit that is configured to perform a function and a surgical device that is configured to actuate the loading unit, the loading unit including at least one axially translatable drive member, and the surgical device including at least one rotatable drive shaft (118,120,122), the adapter assembly comprising: a housing configured and adapted for connection with the surgical device and to be in operative communication with each of the at least one rotatable drive shaft of the surgical device; an outer tube having a proximal end supported by the housing and a distal end configured and adapted for connection with the loading unit, wherein the distal end of the outer tube is in operative communication with each of the at least one axially translatable drive member of the loading unit; at least one force/rotation transmitting/converting assembly (240,250,260) for interconnecting a respective one drive shaft of the surgical device and a respective one axially translatable drive member of the loading unit; and an electrical assembly supported within at least one of the housing and the outer tube, the electrical assembly including: a circuit board; and an electrical connector including a connector housing coupled to a plurality of electrical contact pins, the plurality of electrical contact pins are electrically connected to the circuit board and are configured and adapted to selectively electrically connect to a complementary electrical plug of the surgical device, wherein each of the electrical contact pins of the plurality of electrical contact pins extends through the connector housing. a housing configured and adapted for connection with the surgical device and to be in operative communication with each of the at least one rotatable drive shaft of the surgical device; an outer tube having a proximal end supported by the housing and a distal end configured and adapted for connection with the loading unit, wherein the distal end of the outer tube is in operative communication with each of the at least one axially translatable drive member of the loading unit; at least one force/rotation transmitting/converting assembly (240,250,260) for interconnecting a respective one drive shaft of the surgical device and a respective one axially translatable drive member of the loading unit; and an electrical assembly supported within at least one of the housing and the outer tube, the electrical assembly including: a circuit board; and an electrical connector including a connector housing coupled to a plurality of electrical contact pins, the plurality of electrical contact pins are electrically connected to the circuit board and are configured and adapted to selectively electrically connect to a complementary electrical plug of the surgical device, wherein each of the electrical contact pins of the plurality of electrical contact pins extends through the connector housing. a circuit board; and an electrical connector including a connector housing coupled to a plurality of electrical contact pins, the plurality of electrical contact pins are electrically connected to the circuit board and are configured and adapted to selectively electrically connect to a complementary electrical plug of the surgical device, wherein each of the electrical contact pins of the plurality of electrical contact pins extends through the connector housing.