runes
1. Anything that requires {heavy wizardry} or {black art} to
{parse}: core dumps, {JCL} commands, {APL} or code in a
language you haven't a clue how to read. Not quite as bad as
{line noise}, but close.
Compare {casting the runes}, {Great Runes}.
2. Special display characters (for example, the high-half
graphics on an {IBM PC}).
[{Jargon File}]