The bar codes on packages commonly used internationally are

There are two main types of barcodes on packages that are commonly used internationally:

1. UPC Code (Universal Product Code): This is a North American-specific barcode that identifies the manufacturer and model number of the goods.

2. EAN Code (International Article Number): This is an internationally recognized bar code managed by the International Article Numbering Association (EAN International). It consists of 13 numbers that can be used to identify the manufacturer, country/region, product type and other information of the goods.

Besides UPC and EAN, there are other barcode systems that are used in specific regions or in specific industries, such as Japan's two-dot code and in-store code, and GTIN (Global Trade Item Number) for medical devices.