Answer : 3. "कंप्यूटर की प्रोसेसिंग क्षमता को बढ़ाने, नियंत्रण करने और चलाने के लिए डिजाइन किए गए प्रोग्राम के संग्रह को"
Explanation :

System software is a program designed to run a computer's hardware and applications and manage its resources, such as its memory, processors, and devices. It also provides a platform for running application software, and system software is typically bundled with a computer's operating system.