from
The Free On-line Dictionary of Computing (8 July 2008)
green bytes
green words
<jargon> (Or "green words") {Meta-information} embedded in a
file, such as the length of the file or its name; as opposed
to keeping such information in a separate description file or
record.
By extension, the non-data bits in any self-describing format.
"A {GIF} file contains, among other things, green bytes
describing the packing method for the image".
At a meeting of the SHARE Systems Division, November 22, 1964,
in Washington, DC, George Mealy of {IBM} described the new
block tape format for {FORTRAN} in which unformatted binary
records had a Control Word. George used green chalk to
describe it. No one liked the contents of the Green Word (not
information, wrong location, etc.) so Conrad Weisert and
Channing Jackson made badges saying "Stamp out Green Words".
This was the first computer badge.
Compare {out-of-band}, {zigamorph}, {fence}.
Button 251 (http://mxg.com/thebuttonman/search.asp).
[{Jargon File}]
(1994-11-02)