Etymology of BI=1

["Chuck Creesy" Creesy@xxxxxxxx]

Once upon a time, XyWrite was the text editor used in a series of
high-end typesetting systems developed by a company named Bestinfo.
These systems--SuperPage, PageWright, GalleyWright, etc.--could read
XyWrite's embedded codes (in deltas), and used many additional codes
of their own. The BI=1 setting was created to tell XyWrite not to
object to the presence of such Bestinfo codes in textfiles it was
editing. Accordingly, I always assumed the "BI" derived from Bestinfo.
Can anyone confirm or refute?

Later Bestinfo created its own specialized version of XyWrite using
very elaborate XPL routines, which it called WordWright. It had some
nifty features for collaborative document management on networks.
Bestinfo was bought up by InterGraph, which wanted to use programming
it had developed to integrate databases and catalog production
systems, and ultimately was abandoned. PageMaker and Quark have yet to
match PageWright's precise control of H&J and other typographical
niceties, but that's another story. There are orphans everywhere.