Abstract: A system for searching for keywords and/or keyphrases and/or keysymbols in a data memory containing bit-mapped image patterns for words and/or symbols constructs a keyword/phrase/symbol recognition pattern of the keyword/phrase/symbol to be searched for; scans the data memory to access the bit-mapped image patterns; and processes the constructed keyword/phrase/symbol recognition pattern and the accessed bit-mapped image patterns by correlation to determine the presence in the data memory of a bit-mapped image pattern for the keyword/phrase/symbol.

Abstract: The present specification describes and claims a shower screen unit. The unit basically comprises a roller blind of, for example, woven glass fiber material, housed in an elongate extruded plastics material casing. Two freely rotatable water absorbent sponge rollers are also housed in the casing and the screen passes therebetween, the rollers engaging opposite sides of the screen. The unit can be secured in position by an adhesive sponge layer on the casing and can be decorated by a detachable valance. The lower edge of the screen is divided for use in gripping a wall defining part of a shower area.