<s>[INST] What do files ending in ".obj" contain? [/INST] .obj files can store coordinates for 3D objects, or they can be object files that contain compiled machine code for a given CPU architecture.</s>\ <s>[INST] This ".obj" file is part of a 3D model. [/INST] Yes, .obj files are commonly used to store 3D models in a format that can be easily imported into various 3D graphics software programs.</s>