Pardon ver.2.0.1 => "Burroughs - United States invertor who
patented the first practical adding machine (1855-1898)"

http://www.nao.org.uk/intosai/edp/downloadleader.pdf
"This slide illustrates the rules that apply to Burroughs Packed
and Packed Nibble data types.
· Borroughs Packed
* Very similar to standard packed decimal except the sign appears
in the fist half byte.
· Packed Nibble ...
IN BOTH OF THESE PACKED DECIMAL DATA FORMS THE DECIMAL POINT IS IMPLIED.
Note: The above forms of Packed Decimal Data are not commonly
encountered."