Coin-counting and coin-sorting machines, addressing and mailing machines without a calculating device, document laminators, binding machines, and certain check-writing machines are among the products that frequently fall here when they lack the specific features that would place them in a named heading. As office technology evolves, newly introduced devices with no clear analog in existing headings also tend to land in this residual category initially.

The recommended approach is to work through the SITC or HTS classification hierarchy systematically, ruling out each specific heading before defaulting to the NES category. Supporting documentation should include the machine's technical specifications, its marketed function, and any prior CBP rulings on similar equipment. For high-value or high-volume shipments, a binding ruling request to CBP provides the greatest certainty and protects against reclassification penalties.