1. A two-pass method for Harmonized Tariff Schedule (HTS) classifications using a software user interface to an electronic database system for storing and classifying HTS codes for importing products, comprising: analyzing, by a first person, information published by U.S. Customs pertinent to classifications of HTS codes and assigning, based on an analysis of the information, respective HTS codes to the products; storing each assignment into a classification repository of the electronic database system using the software user interface at a first terminal; accessing, by a second person different from the first person, the classification repository of the electronic database system using the software user interface at a second terminal, the accessing by the second person being subsequent to the storing of the assignments; reviewing, by the second person, the assignments for accuracy; and entering, by the second person into the classification repository using the software user interface at the second terminal, one or more changes to the assignments stored by the first person.