user17540: I have a number of old chess books published by R.H.M. Press. I am curious as to whether "R.H.M." are the initials of something or someone, and if so, what?
As I understand it, R.H.M. Press was the brainchild of Sidney Fried, and Burt Hochberg was the chief editor of many of the books.  Unfortunately, neither of them is still alive.  I found a short article by Hochberg in the Summer 2000 issue of Publishing Research Quarterly entitled "An imperfect visionary," which gives some interesting historical information about R.H.M. Press, but no hint of what R.H.M. might stand for, if anything.
None of the possibilities listed by The Free Dictionary looks plausible to me.

user17911: Edit: This answer is most likely wrong.

I think @Mike Jones was really close here: Googling RHM Press brings up the publisher "Random House" (which is fused with Penguin Books).
According to Wikipedia, Penguin Random House started a Joint Venture with the italian company Arnoldo Mondadori Editore which is called... Random House Mondadori.
I'd suspect that this is indeed the R.H.M. press you were looking for. The group was eventually renamed in 2012, which might explain the absence of any further mentions.

user657: Well, let's take Random House off the table right away, as RHM Press was a division of RHM Associates of Delaware, Inc. which lists Sydney Fried as Publisher. The California Secretary of State system lists an RHM Publishing as a "Doing Business As" name for RHM Associates.
Unfortunately, No list of officers.
There's a blurb in the beginning of San Antonio 1972 (the first book RHM published) that talks a little bit about the venture, but no details. Since the most likely RHM Associates of Delaware I can find is an investment firm, I lean towards the idea the RHM name came from the folks that supplied the money to start it.

17540: <p>I have a number of old chess books published by R.H.M. Press. I am curious as to whether "R.H.M." are the initials of something or someone, and if so, what?</p>

<p>As I understand it, R.H.M. Press was the brainchild of Sidney Fried, and Burt Hochberg was the chief editor of many of the books.  Unfortunately, neither of them is still alive.  I found a <a href="https://go.gale.com/ps/anonymous?id=GALE|A69653067" rel="nofollow noreferrer">short article</a> by Hochberg in the Summer 2000 issue of <i>Publishing Research Quarterly</i> entitled "An imperfect visionary," which gives some interesting historical information about R.H.M. Press, but no hint of what R.H.M. might stand for, if anything.</p>

<p>None of the possibilities listed by <a href="https://acronyms.thefreedictionary.com/RHM" rel="nofollow noreferrer">The Free Dictionary</a> looks plausible to me.</p>
 17911: <pre><code>Edit: This answer is most likely wrong.
</code></pre>

<p>I think @Mike Jones was really close here: Googling RHM Press brings up the publisher "Random House" (which is fused with Penguin Books).</p>

<p>According to <a href="https://en.wikipedia.org/wiki/Random_House" rel="nofollow noreferrer">Wikipedia</a>, <em>Penguin Random House</em> started a Joint Venture with the italian company <em>Arnoldo Mondadori Editore</em> which is called... <strong>Random House Mondadori</strong>.</p>

<p>I'd suspect that this is indeed the R.H.M. press you were looking for. The group was eventually renamed in 2012, which might explain the absence of any further mentions.</p>
 657: <p>Well, let's take Random House off the table right away, as RHM Press was a division of RHM Associates of Delaware, Inc. which lists Sydney Fried as Publisher. The California Secretary of State system lists an RHM Publishing as a "Doing Business As" name for RHM Associates.</p>

<p>Unfortunately, No list of officers.</p>

<p>There's a blurb in the beginning of San Antonio 1972 (the first book RHM published) that talks a little bit about the venture, but no details. Since the most likely RHM Associates of Delaware I can find is an investment firm, I lean towards the idea the RHM name came from the folks that supplied the money to start it.</p>
