A Telecommunications device for the deaf (TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for use by persons with hearing or speech difficulties. Other names for the device include teletypewriter (TTY), textphone (common in Europe), and minicom (United Kingdom).
The typical TDD is a device about the size of a typewriter or laptop computer with a QWERTY keyboard and small screen that uses an LED, LCD, or VFD screen to display typed text electronically. In addition, TDDs commonly have a small spool of paper on which text is also printed — old versions of the device had only a printer and no screen. The text is transmitted live, via a telephone line, to a compatible device, i.e. one that uses a similar communication protocol.
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A. 4x +6-3x is the expression among them
D, Each country in North America uses it’s own currency, they have their own rules, equal rights and rights and different ideas, not everyone is the same in life also, some people use Euros and some people use the U.S. dollar, some people use different things for money.
Explanation:
Water is one of the most important substances on earth. All plants and animals must have water to survive. If there was no water there would be no life on earth. ... Apart from drinking it to survive, people have many other uses for water.
