Vietnamese Braille is a Braille

Braille

The Braille system is a method that is widely used by blind people to read and write, and was the first digital form of writing.Braille was devised in 1825 by Louis Braille, a blind Frenchman. Each Braille character, or cell, is made up of six dot positions, arranged in a rectangle containing two...

 system adapted to the Vietnamese alphabet

Vietnamese alphabet

The Vietnamese alphabet, called Chữ Quốc Ngữ , usually shortened to Quốc Ngữ , is the modern writing system for the Vietnamese language...

. Basic Latin letters use the same Braille cells as English

English language

English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

; however, the system includes additional characters for special letters and tones. Vietnamese Braille is known in Vietnamese

Vietnamese language

Vietnamese is the national and official language of Vietnam. It is the mother tongue of 86% of Vietnam's population, and of about three million overseas Vietnamese. It is also spoken as a second language by many ethnic minorities of Vietnam...

as chữ nổi, literally "raised letters", while Braille electronic displays are called màn hình chữ nổi.

Punctuation marks

Literature and tone marks:

Mathematics:

• Notes:

Only use 4 points: 1, 2, 4 & 5.

Use all dots, but 6.

Use all dots.
Tone marks stand before letter(s).

Example

• One braille for each letter.
• Tones are represented right before vowels.

Example
Màn hình chữ nổi.

⠨⠍⠰⠁⠝ ⠓⠰⠊⠝⠓ ⠉⠓⠤⠳ ⠝⠢⠹⠊⠲