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Merchants are no strangers to rising payment-processing costs. Merchant-processing fees often feel unavoidable, driven by interchange rates and card-network rules that are beyond a merchant’s control.

A Web-based payments transaction processing program has been growing at about 400% annually since it branched out beyond the hospitality industry. When Las Vegas-based Shift4 Corp. developed its $$$ ...

Yin and yang, life and death, Clark Kent and Superman. Some concepts are so intertwined that it’s impossible to imagine one without the other. Transaction processing (TP) and relational databases ...