Again, we need to go back to the early days of the mailing list business. Computer service bureaus had to make a separate “pass” through every record on a file for each list select used. This required more computer and staff time, and those additional costs were passed along to list owners and mailers. Today, most lists can easily be produced according to many different selection criteria. Selection charges are now more a “value-added premium” to be paid for reaching only certain, more desirable groups of names from a list.