Salesforce is a powerful CRM (Customer Relationship Management) system that uses cloud based technology. It does not require any software to be installed, just an internet connection. Payments2Us is an add-on application to Salesforce providing a complete payment solution for your organisation. Payments2Us is available from the Salesforce App directory call the AppExchange.
You will need to understand how Salesforce works and we strongly recommend following their online tutorial to become familiar with features and navigation.