Answer:
I'm a ring of sliced onion dipped in batter and then deep fried.
Other terms for this handy device include doohicky, dooยญ-dad, and whatchyamacallit.
Sends paper without using the post office.
There is one in every corner and two in every room.
What has keys but no locks, Space but no room, You can enter but you canโt exit.
I touch the Earth, I touch the sky, but if I touch you, youโll likely die. What am I?