Imagine a small piece of any mechanism that is so crucial that it failure spells catastrophe. Yikes! How would you call such a thing? It

I Learn; Therefore I Know
Do you know, the field of science concerned with the design, development, modification and application of science and technology?
Imagine a small piece of any mechanism that is so crucial that it failure spells catastrophe. Yikes! How would you call such a thing? It
Have you ever been inside, or wait for an elevator for quite a long while? Sorry dear, if you have; but you got the chance
You’ve noticed that most bathrooms have an exterior light switch, and probably experienced the awful scenario of having the lights shut off by a passerby