3.1. Processing Units (ISTG-PROC)
3.2. Memory (ISTG-MEM)
3.3. Firmware (ISTG-FW)
3.3.1. Installed Firmware (ISTG-FW[INST])
3.3.1. Firmware Update Mechnanism (ISTG-FW[UPDT])
3.4. Data Exchange Services (ISTG-DES)
3.5. Internal Interfaces (ISTG-INT)
3.6. Physical Interfaces (ISTG-PHY)