Path: utzoo!attcan!uunet!munnari!vuwcomp!dsiramd!marcamd!aucsv!ok From: ok@aucsv.UUCP (Richard Okeefe) Newsgroups: comp.arch Subject: Re: Endian wars Summary: a little history Message-ID: <186@aucsv.UUCP> Date: 25 Jan 89 05:00:42 GMT References: <6133@columbia.edu> Organization: Computer Science Dept.,University of Auckland,New Zealand Lines: 15 Before arguing about whether big-endian order or little-endian order is "more natural" for people, it's enlightening to consider the historical origin of the way we write numbers. We write from left to right, and put the most significant digit on the left. But we copied that method of writing numbers from >>Arabic<< mathematics, where the direction of writing was otherwise right to left. So in Arabic, you encountered the low digit first in your normal reading scan. This had the pleasant psychological advantage that when you added two numbers, you wrote the answer down in the order that you always wrote numbers, instead of starting from the opposite end. There was one famous mathematician this century who habitually wrote numbers least-significant-digit- first, apparently for this reason. So _both_ conventions are "natural" in human writing systems.