Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!usc!rpi!batcomputer!munnari.oz.au!manuel!csis!ken
From: ken@csis.dit.csiro.au (Ken Yap)
Newsgroups: comp.text
Subject: Re: Inverted Characters in [di]troff
Keywords: ditroff inverted ohm mho
Message-ID: <1991Mar8.013550.5942@csis.dit.csiro.au>
Date: 8 Mar 91 01:35:50 GMT
References: <17275@sdcc6.ucsd.edu>
Followup-To: sci.electronics
Organization: CSIRO Division of Information Technology
Lines: 14

>I'm taking an electronics class and use ditroff to format the
>tables of formulas that I need.  When we got to Ohms (this is
>a first semester electronics class), I just used \(*W to produce
>the (upper-case) omega (ohm symbol).  When we got to conductance,
>the teacher said that the symbol for this was called am Mho
>("ohm spelled backwards") and that the symbol was an inverted
>ohm (Omega).  Is there any way to produce this symbol using
>troff?
>
>(I'm using DWB 3? without output to tps/tpscript to a NEC 890
>PostScript printer.)

Your teacher is out of date. The SI unit for conductance is siemens
(sing. and pl.). The symbol is S.