This Accessories Container contains a listing of all accessories. The list is broken into sub containers. The first two are used and unused accessories. Used accessories are those which are currently installed in an aircraft whereas unused accessories are those which are not currently installed.
When adding accessories you can choose to create categories for the accessories. For instance you can create a servo category or an engine category. When you create categories sub containers will be created under he main accessory container. This allows you to view a sub set of your accessories that match that specific category. An example of an accessory list is shown below