"Рос" would look ugly and alien to russian user. And i think there's a some sort of habit from early DOS/Win times where layout indicator said "RU", which reads "РУ", not "РО".
"Рос" would look ugly and alien to russian user. And i think there's a some sort of habit from early DOS/Win times where layout indicator said "RU", which reads "РУ", not "РО".