Projection systems are visual display solutions that project images, videos, or presentations onto a screen or flat surface using light and optical components. These systems include digital projectors, overhead projectors, short-throw and long-throw models, laser projectors, and interactive projection technologies. Commonly used in classrooms, conference rooms, home theaters, and large venues, modern projection systems offer features such as HD/4K resolution, high brightness (lumens), wireless connectivity, and compatibility with various input sources. They provide scalable display sizes, making them ideal for both small-group viewing and large-audience presentations.