IEEE 1394 is a standard for a type of connection media. Typically known as Firewire.
Because it has electronic components.
A system
The LHC's full name is the Large Hadron Collider. It is a particle accelerator situated at CERN in Switzerland.
The aiming device of a gun is called a sight. Mechanical devices are known as iron sights, even if they are made of brass or other metals. Sights using lenses are called optical sights, or, if they...