Same difference..."oe" is an alternative way to spell a German word with an o-umlaut (earlier spelled with a little "e" written over the "o"). I don't know how to type the umlaut in this system, but obviously there is a way. (I've seen "o+" used as a way to write the same thing online as well.)
Windows - Alt Key Numeric Codes (courtesy of freeper kayak)
Example: To input the umlaut o (ö) (0246), hold down the ALT key, type 0246 on the numeric keypad, then release the ALT key.