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From: thomas@utah-gr.UUCP (Spencer W. Thomas)
Newsgroups: net.usenix,net.sources,net.unix-wizards
Subject: Re: UNIX System V and 4.1C BSD; stripped underlining backspaces
Message-ID: <881@utah-gr.UUCP>
Date: Mon, 15-Aug-83 00:06:21 EDT
Article-I.D.: utah-gr.881
Posted: Mon Aug 15 00:06:21 1983
Date-Received: Mon, 15-Aug-83 10:25:37 EDT
References: tekmdp.2135
Lines: 5

How about
	sed 's/_\([^_]\)/_^H\1/g'
Where the ^H is of course replaced by a backspace.

=Spencer