WHAT did W invent?

Please give me more context! "W" could refer to many things. For example:

* A person: What did William Shakespeare invent? Or Walt Disney? Or Wright brothers?

* A letter: What did the letter W invent? (This is a trick question, letters don't invent things!)

* A symbol: What did the symbol W invent? (Again, symbols don't invent things!)

Please tell me more about what "W" you are referring to so I can answer your question!