A "panel" is a flat, typically rectangular piece of material used in various applications, such as construction, art, and technology. Panels can be made from different materials, including wood, metal, glass, or plastic, and are often used to create walls, ceilings, or decorative elements. In electronics, a panel may refer to a control interface, like a dashboard in a car or a touchscreen on a device. In discussions or meetings, a "panel" can also refer to a group of experts or individuals who come together to share their knowledge on a specific topic. This type of panel often participates in conferences or forums, providing insights and answering questions from the audience.