Answer:
At night I come without being fetched. By day I am lost without being stolen.
What does everyone know how to open but not how to close?
I am what remains when nothing is left.What am I?
At the sound of me, one may dream or stamp their feet, At the sound of me, one may laugh or sometimes weep.
I drift forever with the current down these long canals they’ve made, Tame, yet wild, I run elusive Multitasking to your aid. Before I came, the world was darker, colder, sometimes, rougher, true. But though I might make living easy, I’m good at killing people too.
When is it bad luck to see a black cat?