3D file formats

What is an STL file? Triangles only What is a STEP file? Exact surfaces and solids (B-rep), assemblies What is a 3MF file? Meshes, units, colours, materials, several objects, build plate What is a GLB file? Meshes, PBR materials, textures, animation, skins, scenes What is an FBX file? Meshes, materials, textures, skeletons, animation, cameras What is an OBJ file? Vertices, UVs, normals, polygons, groups