You can assume TUBITAK SAGE as a university lab. Their main goal is not to mass produce a product, but to develop technologies that are not in Turkey. Similarly, TUBITAK BILGEM develops technologies such as radar, electronic warfare, semiconductor, crypto, software, etc. while TUBITAK MAM develops technologies in the field of materials. So you see, TUBITAK is like a university, SAGE, BILGEM, MAM, etc. are like the laboratories of the university. Defense technologies developed in TUBITAK are transferred to defense industry companies such as ASELSAN, ROKETSAN, HAVELSAN, TAI, TEI etc. according to their fields if requested.