An example integrated interface apparatus for a point-of-sale system, an example point-of-sale system including the integrated interface apparatus, an example method and a computer-readable storage medium for performing a point-of-sale transaction have been disclosed. The integrated interface apparatus includes a base member, a vertical arm member, a display device and a data input device. The base member is configured to be disposed on a counter. The vertical arm member is operatively connected to the base member. The vertical arm member includes a terminal attachment member and a side attachment member below the terminal attachment member. The display device is operatively connected to the terminal attachment member and the data input device is operatively connected to the side attachment member.