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The requested URL /uml-use-case-diagram-examples-for-online-shopping-of-web-customer-actor-with-top-level-use-cases-view-items-make-purchase-and-client-register-other-use-cases-are-customer-authentication-view-recommended-items-add-to-wish-list-checkout-payment-use-case.html was not found on this server. That’s all we know.