Hi there Mr Syan, The bid presented is just an estimation of the work to be done. I assume that you would like the lines that are equal in all the three files. If this is true, this job can be done fast enought so I can return the results within a few hours. I do have a program, that can be customized, so it can discover, and return similar lines between two files. And with this result I can cross with an adicional text file. This budget does not include this program. Please provide addicional specification for a better budget. Best regards, Sérgio Amorim