I warn you about meetings, and I assist you in your life, I can help you do most of your work, unless I have a bug. What am I?

Answer: computer

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I was carried into a dark room, and set on fire. I wept, and then my head was cut off. What am I?
I was cracked by Indiana Jones. What am I?
I was known to Greek philosophers a thousand years ago, I have numbers all in a line, and I can tell you if rain will turn to snow. What am I?
I was not born, but I am here. I have no name, but I am given many. I was made by science and life. What am I?
I watch over you as you sleep without leaving a trace. It only takes one small step to land on my face. What am I?
I wave my hands at you, But I never say goodbye. You’re always cool with me, Even cooler when I’m high. What am I?
I weaken all men for hours each day. I show you strange visions while you are away. I take you by night, by day take you back, None suffer to have me, but do from my lack. What am I?
I wear a green jacket on the outside, white jacket as a second layer, and a red jacket inside. I am pregnant with a lot of babies. What am I?
I wear a red coat and have a stone in my throat. What am I?
I wear a red robe, with staff in hand and a stone in my throat. Cut me and I weep red tears. What am I?
I wear a red robe, with staff in hand and a stone in my throat. What am I?
I widen my jaws when you poke two fingers in me. I especially like to devour papers. What am I?