Mostly for wall or border decoration (you can read letters, but probably not the numbers). Every vertical line column is a letter(plus connection to previous column)! Have fun!
For dozenal counting system, " ' " serves as "0", "0" is "10", "-" is "11", "_" is "-", ":" is division, "*" is multiplication, ";" is for roots (as the opposite of powers, "^")
Clone of White On White. "<" - for beginning a line. ">" - for ending a line. This version is easier to read then the original.
This is a clone of White On White