Electronic transaction system

An electronic transaction system comprising:

• a host server storing an electronic inventory of electronic goods and/or services;
• at least one transaction device having a transaction application;
• at least one service provider system;
• and
• a content management system that provides content in the form of details of the electronic goods and/or services stored in the electronic inventory
• where the transaction device is operable to generate a user interface using the details and generate a client request for one or more of the electronic goods and/or services using the transaction application
• the host server is operable to:
• receive a client request from the transaction device,
• generate a client response to the client request,
• issue a service request to the at least one service provider system,
• receive a service response from the at least one service provider and
• issue the requested electronic goods and/or services to the at least one transaction device based on the service response
• where each transaction device is further operable to:
• receive a scheduled time for transmission of content from the content management system;
• request a set of unique identifiers from the host server on the scheduled time of transmission;
• receive the set of unique identifiers from the host server each unique identifier representing a component of the content, check the set of unique identifiers against content already provided by the content management system and request content having unique identifiers not already provided from the content management system;
• wherein the content management system further receives the request for content having unique identifiers not already provided from the content management system and provides content in response to the request.