Chorded keyboard (a writing system for the blind) uses either 6 or 8 tactile 'points' from which all letters and numbers are formed. When Louis Braille invented it, it was produced with a needle holing successively all needed points in a cardboard sheet. In 1892, Frank Haven Hall, superintendent of the Illinois Institute for the Education of the Blind, created the Hall Braille Writer, which was like a typewriter with 6 keys, one for each dot in a braille cell. The Perkins Brailler, first manufactured in 1951, uses a 6-key chord keyboard (plus a spacebar) to produce braille output, and has been
Typhoon Dot (1989) storm. At least six fatalities were attributed to the storm in Vietnam, and many more were injured. Typhoon Dot (1989) Typhoon Dot, known in the Philippines as Typhoon Kuring, was one of several tropical cyclones to impact southern China and northern Vietnam during the 1989 Pacific typhoon season. Originating from a tropical disturbance near Palau on June 4, Dot tracked west-northwestward towards the Philippines. Crossing the country on June 6, the system moved over the South China Sea and attained typhoon status. Late on June 8, Dot reached its peak intensity with winds estimated at 185 km/h (115 mph). The