Well said! Good timing too, I'm beginning to sketch out how to tackle this large file set processing that has to stitch together data from corresponding files. The magnitude I'm imagining is such that I can't just read all the files into memory and do the matching, number crunching, and what not against. I like the concepts and terminology in this article. Definitely worth keeping in the back pocket going forward if not diving into it all outright. Thanks so much.