Read here:
https://www.americanexpress.com/us/r.../business.html Note that there are some overlapping categories.
U.S. purchases made from electronic goods retailers and software & cloud system providers is likely the same as
Select Computer Hardware, Software, and Cloud Computing
It's not the same. Before the changes to the biz gold card the 4X category was "Select". Now it has the current verbiage which covers all retailers categorized as electronic goods. In a way it's now harder to answer OP's question as there's no definitive list, it depends on the coding.