There are now only 4 types of
writing system in the world. Those
originating in
Mesopotamia including
Roman,
Greek,
Cyrillic,
Arabic, and
Hebrew. Those originating in
north Asia including
Chinese,
Japanese, and
Korean. Those originating in
India including
Devanagari,
Hindi,
Thai. A
4th was once used in
MongoliaSorry Pseudo. I was only considering modern scripts.