System and method for managing multiple applications in a display-limited environment

A head unit of a vehicle, comprising:

• a memory that is configured to store computer instructions, a navigation application, a plurality of user applications, and plurality of first category-management applications, wherein the plurality of first category-management applications includes a first category-management application configured to communicate with a first subset of the plurality of user applications and a second category-management application configured to communicate with a second subset of the plurality of user applications, wherein the plurality of user applications are configured as background processes to execute without direct interaction with a user of the vehicle, and wherein the first category-management application is separate from the second category-management application and the first subset of user applications includes at least one user application that is different from the second subset of user applications;
• an output interface that is configured to present visual content to the user of the vehicle;
• one or more processors that are configured to execute the computer instructions to carry out the following:
• select the first category-management application from the plurality of category-management applications based on a request for content received through the navigation application;
• employ the first category-management application to select a plurality of first user applications from the first subset of user applications based on the request;
• provide, by the first category-management application, the request to the plurality of first user applications;
• receive, by the first category-management application and from the plurality of first user applications, a plurality of first content in response to the request;
• select, by the first category-management application, a first subset of the plurality of first content to provide to the navigation application based on the request;
• select the second category-management application from the plurality of category-management applications based on the request;
• employ the second category-management application to select a plurality of second user applications from the second subset of user applications based on the request;
• provide, by the second category-management application, the request to the plurality of second user applications;
• receive, by the second category-management application and from the plurality of second user applications, a plurality of second content in response to the request;
• select, by the second category-management application, a second subset of the plurality of first content to provide to the navigation application based on the request;
• provide, by the first category-management application, the first subset of content to the navigation application and, by the second category-management application, the second subset of content to the navigation application;
• aggregate, by the navigation application, the first subset of content with the second subset of content into aggregated content based on the request;
• and
• display via the output interface the aggregated content.