An aromatic polyester resin composition, comprising: a melt-kneaded product of 99-70 weight parts of an aromatic polyester resin and 1-30 wt. For example, a mobile device may selectively transition operation from one communication mode to another communication mode based, at least in part, on a determination that certain signaling environment attributes which were previously experienced and identified may once again have been experienced and identified. The signature section, being co-located on the same informational surface as the barcode section, can be simultaneously scannable with the barcode section by a single, portable scanning device. A storage subsystem determines, based on the related information, whether the data relocation requested is possible or not within the particular storage subsystem.