An ASCII-based writing convention, Vietnamese Quoted Readable, and several byte-based encodings including TCVN3, VNI, and VISCII were widely used before Unicode became popular.
ASCII-подобная кодировка Vietnamese Quoted Readable и некоторые другие байтовые кодировки, вроде TCVN3, VNI и VISCII широко использовались в до-юникодовую эпоху.