@tlayoyo
ICL Computer punch card operators expected slashed Oh O Ø, but other computer system operators (reading handwritten coding sheets) assumed it was a slashed zero 0. I can type Ø (The Scandi letter) on Linux but not slashed zero, though there may be a method.

The ICL made somewhat more sense as the Ø Character existed before computers, Except it's a Runic / Nordic / Scandi O, not the English O with a slash.

The Wikipedia disambiguation is 100% correct!