In my earlier message I said the origin of using Xtal for a crystal
was obscure. Bill's message confirms this. Bill, what has X
representing 'trans' got to do with 'crystal'?
CIAO - Martin.
______________________________ Reply Separator _________________________________
Subject: Re: XT
Author: pic microcontroller discussion list <MITVMA.MIT.EDU> at PICLIST
Date: 5/24/98 8:19 PM
X stands for 'trans' as in 'trans'mit and 'trans'former.
Therefore XT means for crystal.
Bill C. cornutt.combill
At 10:58 AM 5/25/98 -0400, you wrote:
> In my earlier message I said the origin of using Xtal for a crystal
> was obscure. Bill's message confirms this. Bill, what has X
> representing 'trans' got to do with 'crystal'?
The X comes from history.
In the "old days" before most Europeans could read, the "X" was used as a
generic signature on legal documents. It was always accompanied by a
witness who COULD sign his name. X was used as a testimony to the writer's
Christianity, signifying the cross of Christ.
Over the years, the X became less centered with that, and came to mean
"cross" of any sort. "Criss" and "cross" sound similar enough that lazy
engineers use xtal. Xform for transformer probably comes from the symbol
for a transformational function - a circle with an X in it, but that's just
Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA
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