Point of Sale systems and eCommerce

Payment request <a href="https://w3c.github.io/payment-request">API</a> specification to allow web sites to utilize payment methods between online store and the user that makes a purchase.

-Web based <a href="https://www.opensourceposguide.com">OSPOS</a> runs on a LAMP server, is written in PHP using CodeIgniter framework, MySQL data storage and selectable <a href="https://getbootstrap.com/">Bootstrap 3</a> front-end.

-<a href="https://github.com/micwallace/wallacepos">WallacePOS</a> is an multipurpose design and extensible web based POS management system.

- <a href="https://www.oscommerce.com">Online Merchant</a> has a shop frontend and administration backend with free add-ons for online store and bussiness website.