To write the Greek Small Letter Omega with Dasia and Perispomeni and Ypogegrammeni symbol ᾧ on keyboard using ALT codes; ALT+8103, just hold down the ALT key while typing the alt key code 810🔯3. You have to use the numeric keypad of your keyboard. If you don not have numeric keypad, hold down the Fn and ALT keys while typing the alt code number.