Abstract: An audio speaker system has at least one expandable speaker enclosure which comprises a rigid upper wall, a speaker mounted to the upper wall and a rigid bottom wall. One edge of the bottom wall is pivotally attached to a corresponding edge of the upper wall. Flexible side walls interconnect the upper and bottom walls so as to form a substantially closed speaker enclosure, the side walls being configured for enabling the enclosure to be varied between a first, collapsed configuration for carrying and a second, expanded configuration having a predetermined optimum enclosed volume for sound quality when in use. A stereo pair of such enclosures have provisions for detachable attachment to the bottom of a keyboard portion of a notebook-type computer. Variations are described in which the stereo pair of expandable disclosures are integrated, in one case, into the keyboard portion, and in another case, into the display portion of a specialized notebook-type computer.

Abstract: Packaging designed for mailing informational media to a recipient, the packaging including a return response with an attached reply card. The packaging protects the informational media from damage during mailing. The informational media may include audio or video tape or a CD. The reply card is detachable from the package. The packaging is preferably secured by an attached closure without the use of other closure mechanisms.