Abstract: Embodiments are described of methods and systems for interchangeable personal bags, such as shoulder bags, hand bags, totes, purses, clutches, and the like. Personal bags of the present teachings can be adapted to change their appearance. According to various embodiments, a first personal bag can be placed within a compartment, pocket, etc. of a second personal bag (or receiving bag), with a flap of the first bag covering at least a portion of an exterior side of the second bag, wherein the outward appearance of the flap of the first bag differs from that of the covered portion of the exterior side of the second bag. The exterior appearance of the second bag can thereby be changed.

Abstract: Embodiments are described for the discrimination of media files to be played by a digital media player, so that non-music or speech files can be filtered, ignored, tagged, or removed, leaving only desired files such as music files that will get played. Other non-desired files (e.g., video files) can be filtered, ignored, tagged, or removed, as well. In various embodiments, duplicate files can be filtered, ignored, tagged, or removed from the media files to be played by the digital media player. The resulting music files can be played as desired by a user, for example, in continuous or random play mode.

Abstract: A door lock apparatus and methods are provided for preventing a child, or other unauthorized person, from opening an appliance (e.g., refrigerator) or cabinet door, while not unduly reducing or impeding access thereto by an authorized person, such as an adult. In various embodiments, the door lock apparatus is configured for locking in place outwardly swinging doors disposed in a side-by-side relationship. For example, a generally “U” or “V” shaped door lock can be adapted, when in a generally inverted orientation, to be slidably and removably received within channels or recesses formed by closely adjacent elongated handles of respective side-by-side doors. In some embodiments, the door lock apparatus can include, among other things, spaced legs depending from an upper support.