Almost every single word in Hebrew was mentioned in the old testament, it doesn't make a word into a religious term though.
Merkava, of course, is a chariot. It was a powerful instrument of war in the ancient world. No religion involved.
David's Sling mentioned here obviously refers to David...
Cyber arm is being established within IDF these days (offensive measures), national cyber security authority (defensive measures) is already in place, so I guess cyber warfare is being taken seriously.
Although most daily threats come from unsophisticated lunatics, distant enemies may come...