we would now call a trivial buffer, the 1260's operator could key in the numbers
Single-character pairs only. Multi-character confusables (rn vs m, cl vs d) are outside scope. These are a known gap in confusables.txt itself.
，这一点在Line官方版本下载中也有详细论述
Toward the end of the prolific 1980s, Beagle Beos tried to strike it big by making an integrated office suite:
What to look for in an ergonomic keyboard