What is one type of writing?

Writing can mean using letters and symbols to represent sounds and Words of a language such as "I like writing letters to my friends."

Writing can mean the actual Words and letters, such as "Writing was invented thousands of years ago."

Writing can mean the work of an author, such as "His writing can be found in any bookstore today."

Writing means making a paragraph or a Word using letters, numbers, characters as well as writing materials such as pencil and paper.