One transistor embodiment includes a first sourcedrain region, a second sourcedrain region, and a channel region therebetween. The method includes the steps of displaying one or more user input devices on a touchscreen panel, receiving user inputs on a face of the touchscreen panel, and generating input signals in response to the user inputs. As a result, the first electronic device and the second electronic device form a stair-like structure. The pixel groups in the reference image that are the best match for the two or more pixels groups in the acquired image are selected. Pyrido3,4-bindoles are described, as are pharmaceutical compositions comprising the compounds and methods of using the compounds in a variety of therapeutic applications, including the treatment of a cognitive disorder, psychotic disorder, neurotransmitter-mediated disorder andor a neuronal disorder.