What is the fine-grained topic of the following text: Since 1990, AYESAŞ is a major sensor and systems integration solutions supplier to the Turkish Armed Forces, as well as an Air Defense and Naval C4I, Maritime Surveillance and Situational Awareness solutions provider, advanced electronics and electro-mechanical assembly supplier for major global aerospace and defense companies. Only return the topic.
AYESAŞ' role in the Turkish Armed Forces and global aerospace and defense industries