Verified answer

There is something called as character map in all programs>accesories

The thing is already installed on your pc, just search it

Hold down alt and press 239 on the numberpad.

This does not work everywhere, in some text fields it just shows up as an ï.

(which is what you get when when you hold down alt and press 139)

I'm not sure how this works on a mac, and you must use a numberpad, not the numbers above your letter keys.

You can get all sorts of abnormal characters by typing random numbers into the numberpad while pressing alt, like this one ☺

If it's the Greek symbol for Omega

Ω

it's

Alt+03A9

See -> http://www.alt-codes.net/

It's an Alt Code.

(For some Reason that Code Dont Work (239)

Hope it helps :)