Hi there, info1472.

Welcome and thank you for posting here in QuickBooks Community. 

Currently, we didn't receive any information from other users who use a specific Bar Code Scanning System for an inventory that is compatible with QuickBooks Online. We are unable to provide a particular Bar Code Scanning System for inventory to use. However, you can visit our Intuit apps center to search for available apps to scan your inventory. All apps that you'll see from there are compatible with QBO.

You can also visit the QuickBooks Blog website to see the most up to date information about the products’ services and features.

As always, feel free to read the topics from our QuickBooks help articles in case you need guides while working with QuickBooks in the future.

Get back to us here on the Community page if you have any other questions. I'm a few clicks away to help. Keep safe always!