I'm new to this program. I often have to search for lists of serial numbers in a large file of several hundred thousand lines, lets say 400K lines. The data I'm searching for can be a few serial numbers or perhaps hundreds of serials. Typically I would have these serials in a separate listing.

I have used Excel doing VLOOKUPS, and have written PowerBasic code to do these searches. But Excel is a bit of a grind setting up the VLOOKUP data, etc. My Power Basic code runs as a single thread, fairly slowly.

Can Fileseek do this easily and quickly?

Thanks, SamG

Yes, the serials are always 7 characters long. Thanks.