Aw: Re: IBM 1620 invalid character symbol

From: Jörg Knappen <>
Date: Tue, 26 Sep 2017 15:28:53 +0200
I found the character in question on p. 52, it is a picture of something handwritten, not a typeset character. "Clearly" means something different to me.
--Jörg Knappen
Gesendet: Dienstag, 26. September 2017 um 15:03 Uhr
Von: "John W Kennedy via Unicode" <>
An: "Leo Broukhis" <>,
Betreff: Re: IBM 1620 invalid character symbol
I don’t know what your snippet is from, but the normally authoritative IBM manual, A26-5706-3, IBM 1620 CPU Model 1 (July, 1965) displays what is clearly the Cyrillic letter. Whether it should be regarded as that, or as a distinct character, is another question. See

On Sep 26, 2017, at 12:48 AM, Leo Broukhis via Unicode <> wrote:
Wikipedia ( describes the "invalid character" symbol (see attachment) as a Cyrillic Ж which it obviously is not. 
But what is it? Does it deserve encoding, or is it a glyph variation of an existing codepoint?
The question is somewhat prompted by 
in the pipeline, although I learned about both earlier today within a few minutes of one another.
Received on Tue Sep 26 2017 - 08:29:17 CDT

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