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In order for you to make use of all these potential contacts effectively, you will have to key in all of that information into your computer. This is where the business card scanner comes in. Now, you may have already been using a Rolodex all these years, and have managed to keep your contacts tidy so far. However, a Rolodex can get filled up in a surprisingly short time, and you will have to pore through it and discard the business cards that you don't need sooner or later. This shouldn't be a problem in most cases, unless you need to find a contact that you had inadvertently thrown out.