published by dev.toolstop

3 listings on this page, in order of arrival. Each one has its own page with README, repository facts and source links.

1. Check Digits
   Catch a mistyped barcode, ISBN, VIN, NPI or LEI before a bad identifier corrupts a record.
2. Export Control
   Does the US Commerce Country Chart require an export licence for an ECCN to a destination?
3. Proposition 65
   Is a chemical on California's Proposition 65 list, and does it need a warning?