Abstract: Dynamic data tiling is provided. In various embodiments, a request is received for a tile of geographic data from a requestor. The request specifies a region relative to a projection. The region is looked up in a spatial index to determine one or more source tiles. The spatial index corresponds to the projection and the one or more source tiles intersecting the region. The one or more source tiles are requested from a proxy. The proxy is configured to maintain one or more persistent connections to one or more datastores and to retrieve the one or more source tiles via the one or more persistent connections. The one or more source tiles is received from the proxy. The requested tile of geographic data is constructed from the one or more source tiles. The requested tile of geographic data is provided to the requestor.

Abstract: A handheld voice activated spelling device includes a housing and a cover secured to the housing. A power source and microphone are mounted within the housing and control switches are operable from the front surface of the housing. A first memory has a plurality of words stored therein. A second memory has a plurality of word definitions stored therein, each associated with a respective word. A speech recognition apparatus is coupled to the microphone and to the first memory and responsive to the electronic signals generated by the microphone for selecting at least one word from the first memory representative of the specific word spoken by the user. A display is provided for displaying the plurality of words and the plurality of word definitions when the user operates a selected control switch. A related word classification can be also selected from a third memory and displayed on the display.

Abstract: A handheld voice activated spelling device includes a housing and a cover secured to the housing. A power source and microphone are mounted within the housing and control switches are operable from the front surface of the housing. A first memory has a plurality of words stored therein. A second memory has a plurality of word definitions stored therein, each associated with a respective word. A speech recognition apparatus is coupled to the microphone and to the first memory and responsive to the electronic signals generated by the microphone for selecting at least one word from the first memory representative of the specific word spoken by the user. A display is provided for displaying the plurality of words and the plurality of word definitions when the user operates a selected control switch. A related word classification can be also selected from a third memory and displayed on the display.