What is the Difference between Code 128 A, B, and C?

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What is the Difference between Code 128 A, B, and C?

by Nate Schubert

The Code 128 barcode symbology is divided into 3 separate character sets; A, B and C, with auto being the fourth and final set which uses a combination of A, B and C. This is a point of confusion for those new to the field of barcode technology, and there aren’t a lot of places on the Internet that properly explain the subtle differences between the two.
Taken straight from the IDAutomation knowledge base, the differences between the various Code 128 Character Sets are fully explained in the following forum post to help you better understand.