A surgical system , comprising: a housing ; a shaft extending from said housing; an end effector extending from said shaft; a first drive electric motor ; a first shifter electric motor configurable in a first configuration and a second configuration; a first drive system configured to perform a first end effector function, wherein said first drive system is drivable by said first drive electric motor when said first shifter electric motor is in said first configuration; a second drive system configured to perform a second end effector function, wherein said second drive system is drivable by said first drive electric motor when said first shifter electric motor is in said second configuration, wherein said second drive system is not drivable by said first drive electric motor when said first shifter electric motor is in said first configuration, and wherein said first drive system is not drivable by said first drive electric motor when said first shifter electric motor is in said second configuration; a second drive electric motor ; a second shifter electric motor configurable in a third configuration and a fourth configuration; a third drive system configured to perform a third end effector function, wherein said third drive system is drivable by said second drive electric motor when said second shifter electric motor is in said third configuration; and a fourth drive system configured to perform a fourth end effector function, wherein said fourth drive system is drivable by said second drive electric motor when said second shifter electric motor is in said fourth configuration, wherein said fourth drive system is not drivable by said second drive electric motor when said second shifter electric motor is in said third configuration, and wherein said third drive system is not drivable by said second drive electric motor when said second shifter electric motor is in said fourth configuration. a housing ; a shaft extending from said housing; an end effector extending from said shaft; a first drive electric motor ; a first shifter electric motor configurable in a first configuration and a second configuration; a first drive system configured to perform a first end effector function, wherein said first drive system is drivable by said first drive electric motor when said first shifter electric motor is in said first configuration; a second drive system configured to perform a second end effector function, wherein said second drive system is drivable by said first drive electric motor when said first shifter electric motor is in said second configuration, wherein said second drive system is not drivable by said first drive electric motor when said first shifter electric motor is in said first configuration, and wherein said first drive system is not drivable by said first drive electric motor when said first shifter electric motor is in said second configuration; a second drive electric motor ; a second shifter electric motor configurable in a third configuration and a fourth configuration; a third drive system configured to perform a third end effector function, wherein said third drive system is drivable by said second drive electric motor when said second shifter electric motor is in said third configuration; and a fourth drive system configured to perform a fourth end effector function, wherein said fourth drive system is drivable by said second drive electric motor when said second shifter electric motor is in said fourth configuration, wherein said fourth drive system is not drivable by said second drive electric motor when said second shifter electric motor is in said third configuration, and wherein said third drive system is not drivable by said second drive electric motor when said second shifter electric motor is in said fourth configuration. <EOS>