"In the Apple II ROMs, I even stuck in my own floating point routine. It wasn't incorporated into the BASIC, but I just didn't want the world thinking I couldn't write floating point routines." -- Steve Wozniak [0]

[0] https://www.10zenmonkeys.com/2007/07/03/steve-wozniak-v-step...

I'm not clear on which Apple II ROMs (INTEGER BASIC or Applesoft ROM, or both) he's referring to.