Writing first appeared around 6,000 years ago, with the earliest evidence being clay tablets from Mesopotamia. The earliest alphabetic writing was developed by the Phoenicians. The Greeks borrowed that alphabet, with modifications to suit the sound system of Greek.
Most modern writing systems use some form of the Roman alphabet. However, there are a few cases of unique writing systems that were invented to suit the needs of a single language. Here are 10 writing systems used by only one language.