The TerSCII character set is designed to serve in the world of ternary
information processing systems.
With 26 letters in the English alphabet and comparable numbers in other
western and middle-eastern alphabets, the first power of 3 that lends itself to
representing a reasonable character set is 34 or 81. A 4-trit character allows encoding the Roman alphabet in
both upper and lower case, plus 10 digits and a modest (but insufficient) set
of control characters and punctuation marks. In this environment, a code
extension system comparable to that of Unicode invites a character code built
on 81-character blocks.