Abstract: A system for increasing the useful viewing angle in an array of video display units, also called a video wall, comprising the duplication of an outer marginal strip of the displayed image on adjacent video display units, a cylindrical lens structure mounted over the frame of each video display units and outer strip, with a spatial compression of a portion of outer strip, or the duplication of the image in an outer marginal strip of the displayed image in adjacent video display units, and a spherical lens placed over the entire viewing surface and frame of each video display unit. With proper selection of lens parameters and aforementioned image modifications, the invention produces a magnified image that obscures the image of the frame between adjacent video display units and gives the effect of a single large display over an increased viewing angle.

Abstract: An audio system for conducting confidential multi-person conferences without the need for secure meeting facilities. Means for silently accepting spoken speech from a number of participants and making that speech available to all participants through headphones. Means for controlling the volume of the speech for each participant. Means for indicating which participant(s) are speaking. Means for masking any incidental speech escaping from masks. Means for alerting participants when speech is escaping from a mask. Means to allow modular expansion of the number of participants. Means for recording the meeting for later listening or transcription.

Abstract: A semi-automatic picking system having pick modules associated with individual compartments of storage bays includes a switch, for manually decrementing or incrementing the module to indicate the number picked. One or more orders may be picked at the same time. Such information is stored for use with a data input device and a control unit.