The Phoenician alphabet was a non-pictographic consonantal alphabet, or abjad. It became one of the most widely used writing systems, spread by Phoenician merchants across the Mediterranean world, where it evolved and was assimilated by many other cultures. The Aramaic alphabet, a modified form of Phoenician, was the ancestor of modern Arabic script, while Hebrew script is a stylistic variant of the Aramaic script. The Greek alphabet (and by extension its descendants such as the Latin, the Cyrillic and the Coptic), was a direct successor of Phoenician, though certain letter values were changed to represent vowels.