1.4. Ensure Common Understanding To have a common terminology, it is important to resolve the communication difficulties within the diverse range of stakeholders. A glossary of terms can provide a simple but a valuable solution to these issues. Prototype: A first or preliminary version of a device from which other forms are developed Enclosure: Structure consisting an area that has been enclosed for some purpose Components: A part or element of a larger whole, especially a part of machine PCB: Printed Circuit Board Connectors: A device for keeping two parts of an electric circuit in contact Rechargeable: (of a battery or a battery-operated device) able to have its electrical energy restored by connection to a power supply. Water-proof: Not allowing water to pass through. Investors: A person or an organization that puts money with the expectation of achieving a profit. Designers: People who plan the look and workings of something prior to it being made.