Base stystem in dating
The metric system is an internationally adopted decimal system of measurement.
It is in widespread use, and where it is used, it is the only or most common system of weights and measures.
Braille is also produced by a machine known as a braillewriter.
Unlike a typewriter which has more than fifty keys, the braillewriter has only six keys, a space bar, a line spacer, and a backspace.
With paper placed in the slate, tactile dots are made by pushing the pointed end of the stylus into the paper over the depressions. Because of they are inexpensive and portable, the slate and stylus are especially helpful for carrying to jot quick notes and for labeling such things as file folders.Technological developments in the computer industry have provided and continue to expand additional avenues of literacy for braille users.Software programs and portable electronic braille devices allow users to save and edit their writing, have it displayed back to them either verbally or tactually, and produce a hard copy via a desktop computer-driven braille embosser.A full braille cell consists of six raised dots arranged in two parallel rows each having three dots.The dot positions are identified by numbers from one through six.
These "short cuts" are used to reduce the volume of paper needed for reproducing books in braille and to make the reading process easier.