Leonardo da vinci wrote most of his personal notes in mirror writing. Most of his notebooks were written in mirror writing.
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It is not known who taught Leonardo Da Vinci how to read and write. Though since he spent the first five years of his life with his mother it's likely she taught him or found a teacher who taught him.
An oracle
They used symbols and drawings to write. This king of writing is called Codex
The Phoenician alphabet, the basis of modern European writing.
Engineering writing is similar to scientific writing.They write the technical reports based on the their work.