The STL (Stereolithography) file format is a widely used file format for representing 3D surface geometry. It is primarily used for rapid prototyping, 3D printing, and computer-aided manufacturing (CAM). An STL file describes a 3D object's surface as a collection of triangles. Each triangle is defined by its three vertices and a normal vector, which indicates the direction the triangle is facing. The format is simple and efficient, making it suitable for representing complex shapes. However, STL files only store surface geometry and do not contain information about color, texture, or material properties. This limitation means that STL files are often used in conjunction with other file formats that provide this additional information. The simplicity of the STL format has contributed to its widespread adoption, making it a standard for exchanging 3D models between different software applications and hardware devices. While newer formats offer more features, STL remains a popular choice due to its compatibility and ease of use.