De-Duplication Program for Excel Files

I would like to create a program that pulls out all duplicate records in either an .xls, .txt, or .csv file. Using the email address as the primary key in the file in order to search for duplicate records. The program should create a new file containing only the unique records, and the most important aspect of this is speed! SPEED, the program should be able to perform this function in under 2minutes per 10000 Records inputted into the system. This is a simple program and ma ybe done via a variety of coding solutions, be creative and as long as it works we're happy. Experienced coders understand the simplicity of this program and we would like to hear your bids. Also I need in-depth documentation about how to use the software broken down so even a novice user may understand ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform WINDOWS