Cross-walk a traded-good code across HS (6-digit international Harmonized System) <-> HTS (US 10-digit import) <-> Schedule B (US 10-digit export) <-> NAICS industry. Pass the system + code and get the shared HS6, the official description, the matching Schedule B and HTS national lines, the NAICS industry(ies), and the SITC code. The join an import/export, customs, or supply-chain agent needs to move between the export schedule, the import tariff schedule, the international HS level, and the industry that makes the good -- all keyed on the globally-harmonized HS6 bridge. Backed by bundled public-domain US Census Foreign Trade concordances (Schedule B + HTS, latest annual). For a 10-digit input the NAICS is narrowed to that exact national line; cross-schedule lines are surfaced via the shared HS6 and flagged in notes. Companion to trade.tariff (duty rates) and business.naics (industry detail).