Stuart Yeates wrote: > Do any of these have built-in indexing? 800k records isn't going to fit in memory and if building my own MARC indexer is 'relatively straightforward' then you're a better coder than I am. you could try marcdb[1] from marctools[2] [1] https://github.com/ubleipzig/marctools#marcdb [2] https://github.com/ubleipzig/marctools -- raffaele