On 20 Jul 2001, at 11:53, Fergal Suipeil wrote: >It's a form of weak proprietary encryption called EBCDIC. My memory of it is that it was a numeric reflection of a storage medium based on cutting little rectangles in roughly 3"x7" pieces of cardboard, and sorta made sense in that context. My High School (FAAHS am Main) had access to a corporate computer (initially with 8K, replaced by a 32K monster), but not the room with the corporate keypunch, so I've had the thrill of fixing bugs in a Fortran deck by cutting little triangles in replacement blank cards with an Exacto knife. -Kary