Expandable accessory box and packaging system for packaging electronic systems

An accessory box for use in packaging accessories together in a primary box with an electronic system component, the accessory box including:

• (a) a first side and an extension side spaced apart from each other to define a first accessory box volume, with an access opening extending between the first side and the extension side on a top side of the accessory box
• (b) a number of extension members connected to the accessory box and positionable alternatively in an extended position or a retracted position, the extension members extending outwardly from the extension side when in the extended position;
• and
• (c) a first retainer device connected to at lease one of the extension members at a distal end of the respective extension member, the retainer device including a tab extending from the distal end of the respective extension member, the respective tab having a length along the distal end of the respective extension member less than the length of the distal end of the respective extension member and being adapted to cooperate with a second retainer device on the primary box to hold the respective extension member in the extended position.