Customer interaction manager on a point of sale computer

A method of managing customer interaction with a business implemented by a point of sale computer located at the business and communicating over the Internet with a server computer, the method comprising:

• starting a purchase transaction for a customer present at the business;
• establishing an Internet session with the server computer by transmitting a purchase transaction started notification for the started purchase transaction;
• receiving a unique identifier from the server computer in response to transmitting the purchase transaction started notification where the unique identifier uniquely identifies the started purchase transaction;
• providing the unique identifier and a uniform resource locator (URL) to the customer where the URL is an Internet address serviced by the server computer;
• receiving a request using the Internet session with the server computer over the Internet where the request includes the unique identifier;
• and
• processing the received request where processing the request include using the unique identifier to identify the started purchase transaction.