Library / Mathematics / How to become a lightning calculator / Braille
How to become a lightning calculator ⠃⠗⠋ braille edition
Grade 2 — contracted English braille (EBAE-compatible subset). Translated on this server by our own braille engine (BRF — Braille Ready Format, Library of Congress fdd000551). View Grade 1 instead.
Download .brf — Grade 2 Download .brf — Grade 1 Plain-text reader .txt
15,600 braille cells · 17 embossed pages at 40×25 · 219 unrepresentable characters omitted
⠀⠋⠊⠛⠥⠗⠑⠲⠀⠀⠀⠀⠶⠼⠑⠀⠀⠼⠓⠶⠀⠀⠼⠙⠀⠉⠜⠗⠊⠫⠀⠀⠼⠙⠙⠀⠀ ⠼⠉⠰⠙⠀⠯⠀⠼⠙⠹⠀⠋⠊⠛⠥⠗⠑⠎⠲⠀⠀⠀⠀⠠⠃⠽⠀⠁⠀⠇⠊⠞⠞⠇⠑⠀ ⠏⠗⠁⠉⠞⠊⠉⠑⠀⠁⠝⠽⠀⠐⠕⠀⠍⠁⠽⠀⠃⠑⠉⠕⠍⠑⠀⠵⠀⠋⠁⠍⠊⠇⠊⠜⠀⠾⠀ ⠹⠊⠎⠀⠗⠥⠇⠑⠀⠯⠀⠀⠵⠀⠗⠑⠁⠙⠽⠀⠔⠀⠊⠞⠎⠀⠁⠏⠏⠇⠊⠉⠁⠞⠊⠕⠝⠀⠵⠀ ⠾⠀⠮⠀⠕⠗⠙⠔⠜⠽⠀⠍⠑⠹⠕⠙⠲⠀⠀⠀⠀⠠⠞⠕⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀⠁⠝⠽⠀ ⠝⠥⠍⠃⠻⠀⠃⠽⠀⠼⠃⠤⠁⠸⠌⠃⠂⠀⠁⠙⠙⠀⠐⠕⠀⠉⠊⠏⠓⠻⠂⠀⠯⠀⠙⠊⠧⠊⠙⠑ ⠀⠃⠽⠀⠼⠙⠲⠀⠀⠀⠀⠠⠞⠕⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀⠁⠝⠽⠀⠝⠥⠍⠃⠻⠀⠃⠽⠀ ⠼⠉⠤⠁⠸⠌⠉⠂⠀⠁⠙⠙⠀⠐⠕⠀⠉⠊⠏⠓⠻⠂⠀⠯⠀⠙⠊⠧⠊⠙⠑⠀⠃⠽⠀⠼⠉⠲⠀⠀ ⠠⠞⠕⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀⠃⠽⠀⠼⠉⠉⠤⠁⠸⠌⠉⠂⠀⠁⠙⠙⠀⠞⠺⠕⠀ ⠉⠊⠏⠓⠻⠎⠂⠀⠯⠀⠙⠊⠧⠊⠙⠑⠀⠃⠽⠀⠼⠉⠲⠀⠀⠀⠀⠠⠞⠕⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀ ⠁⠝⠽⠀⠝⠥⠍⠃⠻⠀⠃⠽⠀⠼⠁⠤⠉⠸⠌⠛⠂⠀⠁⠙⠙⠀⠐⠕⠀⠉⠊⠏⠓⠻⠂⠀⠯⠀ ⠙⠊⠧⠊⠙⠑⠀⠃⠽⠀⠼⠛⠲⠀⠀⠀⠀⠠⠞⠕⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀⠃⠽⠀ ⠼⠁⠋⠤⠃⠸⠌⠉⠂⠀⠁⠙⠙⠀⠞⠺⠕⠀⠉⠊⠏⠓⠻⠎⠂⠀⠯⠀⠙⠊⠧⠊⠙⠑⠀⠃⠽⠀ ⠼⠋⠲⠀⠀⠀⠀⠠⠞⠕⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀⠃⠽⠀⠼⠁⠙⠤⠃⠸⠌⠛⠂⠀⠁⠙⠙⠀⠞⠺⠕ ⠀⠉⠊⠏⠓⠻⠎⠂⠀⠯⠀⠙⠊⠧⠊⠙⠑⠀⠃⠽⠀⠼⠛⠲⠀⠀⠀⠀⠠⠞⠕⠀⠍⠥⠇⠞⠊⠏⠇⠽ ⠀⠃⠽⠀⠼⠓⠛⠑⠂⠀⠁⠙⠙⠀⠹⠗⠑⠑⠀⠉⠊⠏⠓⠻⠎⠂⠀⠯⠀⠙⠊⠧⠊⠙⠑⠀⠃⠽⠀ ⠼⠓⠲⠀⠀⠀⠀⠠⠞⠕⠀⠙⠊⠧⠊⠙⠑⠀⠃⠽⠀⠼⠃⠑⠂⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀⠃⠽⠀ ⠼⠙⠂⠀⠯⠀⠉⠥⠞⠀⠷⠋⠀⠞⠺⠕⠀⠋⠊⠛⠥⠗⠑⠎⠲⠀⠀⠀⠀⠠⠞⠕⠀⠙⠊⠧⠊⠙⠑⠀ ⠃⠽⠀⠼⠁⠃⠑⠂⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀⠃⠽⠀⠼⠓⠂⠀⠯⠀⠉⠥⠞⠀⠷⠋⠀⠹⠗⠑⠑⠀ ⠋⠊⠛⠥⠗⠑⠎⠲⠀⠀⠀⠀⠠⠞⠕⠀⠍⠥⠇⠞⠊⠏⠇⠽⠀⠃⠽⠀⠼⠁⠃⠤⠁⠸⠌⠃⠂⠀ ⠁⠙⠙⠀⠞⠺⠕⠀⠉⠊⠏⠓⠻⠎⠂⠀⠯⠀⠙⠊⠧⠊⠙⠑⠀⠃⠽⠀⠼⠓⠲⠀⠀⠀⠀⠠⠞⠕⠀ ⠋⠔⠙⠀⠮⠀⠧⠁⠇⠥⠑⠀⠷⠀⠁⠝⠽⠀⠝⠥⠍⠃⠻⠀⠷⠀⠁⠗⠞⠊⠉⠇⠑⠎⠀⠁⠞⠀ ⠼⠛⠑⠀⠉⠢⠞⠎⠀⠑⠁⠡⠂⠀⠙⠫⠥⠉⠞⠀⠀⠐⠕⠤⠟⠥⠜⠞⠻⠀⠷⠀⠮⠀⠝⠥⠍⠃⠻⠀ ⠋⠀⠊⠞⠎⠑⠇⠋⠀⠯⠀⠉⠁⠇⠇⠀⠮⠀⠗⠑⠍⠁⠔⠙⠻⠀⠙⠕⠇⠇⠜⠎⠲⠀⠀⠀⠀⠀⠀ ⠠⠞⠕⠀⠠⠎⠥⠃⠞⠗⠁⠉⠞⠀⠠⠁⠝⠽⠀⠠⠝⠥⠍⠃⠻⠀⠠⠉⠕⠝⠎⠊⠌⠬⠀⠷⠀
These are the same pages the .brf download embosses — form-feed breaks and all. BRF opens in braille software (Duxbury, BrailleBlaster), on embossers, and on refreshable displays.