Actually I saw this term recently on the ANTHRO-L listserv,
(published by Computing and IT, Buffalo) and I don't know who said
what from that page but this is the link. (Probably useless because
it is too long.)

I knew the term previously in Fench.

I think some of the difficulty is that I consider myself a client of
writing system typology for a specific purpose and am looking for a
typology that will tell me about how scripts are processed by
people. These are scripts that I know how to use, so I know about
the structure of the script, but am having difficulty finding good
input methods for.

Suzanne McCarthy