Before 1984 BMDindex, like other commercial services, uses the page images of the original typed and handwritten GRO indexes. Because the quality of the typed indexes is too poor to use optical character recognition software to create searchable indexes, every page has been indexed by the first and last name it contains. Thus a search will always find a page your entry may be found on, because it contains the range of names that fits your search criteria. This points you accurately to the index pages to view for each three-month, quarter period, meaning fewer records to view.

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