Method and system for memory devices is provided. The algorithm is a function of a set of parameters. The shoulder straps can be deployed in order to wear the bag as a backpack or may remain concealed in the gussets when the bag is functioning as a handheld shopping bag. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members.