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 (364,366), 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 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 at least partially within at least one of the housing and the outer tube, the electrical assembly including: a proximal electrical assembly configured to electrically communicate with the surgical device, the proximal electrical assembly being rotatably fixed with respect to the surgical device, the proximal electrical assembly including a plurality of electrical contact rings disposed around a slip ring; and a distal electrical assembly disposed in electrical communication with the loading unit, the distal electrical assembly being rotatable with respect to the proximal electrical assembly, the distal electrical assembly including a plurality of electrical contacts disposed in mechanical cooperation with a contact housing, each electrical contact configured to contact and maintain an electrical connection with one of the plurality of electrical contact rings of the proximal electrical assembly during rotation of the distal electrical assembly with respect to the proximal electrical assembly. a housing configured and adapted for connection with the surgical device and to be in operative communication with each 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 at least partially within at least one of the housing and the outer tube, the electrical assembly including: a proximal electrical assembly configured to electrically communicate with the surgical device, the proximal electrical assembly being rotatably fixed with respect to the surgical device, the proximal electrical assembly including a plurality of electrical contact rings disposed around a slip ring; and a distal electrical assembly disposed in electrical communication with the loading unit, the distal electrical assembly being rotatable with respect to the proximal electrical assembly, the distal electrical assembly including a plurality of electrical contacts disposed in mechanical cooperation with a contact housing, each electrical contact configured to contact and maintain an electrical connection with one of the plurality of electrical contact rings of the proximal electrical assembly during rotation of the distal electrical assembly with respect to the proximal electrical assembly. a proximal electrical assembly configured to electrically communicate with the surgical device, the proximal electrical assembly being rotatably fixed with respect to the surgical device, the proximal electrical assembly including a plurality of electrical contact rings disposed around a slip ring; and a distal electrical assembly disposed in electrical communication with the loading unit, the distal electrical assembly being rotatable with respect to the proximal electrical assembly, the distal electrical assembly including a plurality of electrical contacts disposed in mechanical cooperation with a contact housing, each electrical contact configured to contact and maintain an electrical connection with one of the plurality of electrical contact rings of the proximal electrical assembly during rotation of the distal electrical assembly with respect to the proximal electrical assembly.