Terry Simpson wrote: "Unfortunately, 'E' is currently allocated as a prefix ..."
I hate to break this to you, but the letter m is both a unit and a prefix, so it's not as if there wouldn't be a precedent. Also, if we were to replace da, h and k, with D, H and K (as has often been recommended), K would be both a unit and a prefix. As prefixes are never used in isolation, there is never any ambiguity. In any case, I wouldn't expect to see too many references to exaeuclids. Bill Potts, CMS Roseville, CA http://metric1.org [SI Navigator]
