The information included on a barcode can vary depending on the type of barcode used and the specific application. 

However, in general, a barcode typically contains a unique identifier that can be used to look up information about a product or item. Here are some of the most common types of information that can be included on a barcode:

1. Product code: The product code is a unique identifier that is assigned to a specific product or item. This code can be used to look up information such as the product name, manufacturer, and price.

   
   

2. Batch or lot number: In some applications, a barcode may include a batch or lot number that can be used to track the production and distribution of a specific batch of products.

   
   

3. Expiration date: In applications such as food and pharmaceuticals, a barcode may include an expiration date that can be used to ensure that products are not sold or used after their expiration date.

   
   

4. Serial number: In some applications, a barcode may include a serial number that can be used to track the individual history of a specific item.

   
   

Overall, the information included on a barcode will depend on the specific application and the requirements of the business or organization using the barcode.