Magento 2.1.x Notice: Magento 2.1.18 is the final 2.1.x release. After June 2019, Magento 2.1.x will no longer receive security patches, quality fixes, or documentation updates. To maintain your site's performance, security, and PCIPayment Card Industry: Refers to debit and credit cards and their associated businesses. compliance, upgrade to the latest version of Magento. The Magento User Guide 2.1.x remains available in PDF for Open Source and Commerce.
Magento Open Source supports a variety of payment methods, services, and gateways that you can offer for your customers’ convenience.
These guidelines outline the requirements set by the Payment Card Industry (PCIPayment Card Industry: Refers to debit and credit cards and their associated businesses.) for businesses that accept payment by credit card over the Internet.