From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE, RDNS_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 Received: (qmail 26759 invoked from network); 20 Mar 2020 15:08:13 -0000 Received-SPF: pass (minnie.tuhs.org: domain of minnie.tuhs.org designates 45.79.103.53 as permitted sender) receiver=inbox.vuxu.org; client-ip=45.79.103.53 envelope-from= Received: from unknown (HELO minnie.tuhs.org) (45.79.103.53) by inbox.vuxu.org with ESMTP; 20 Mar 2020 15:08:13 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 5CAB49D794; Sat, 21 Mar 2020 01:07:31 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id D12B39D667; Sat, 21 Mar 2020 01:07:05 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="FTRj46gp"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 27DC79D667; Sat, 21 Mar 2020 01:07:05 +1000 (AEST) Received: from mail-ot1-f48.google.com (mail-ot1-f48.google.com [209.85.210.48]) by minnie.tuhs.org (Postfix) with ESMTPS id 373C69D5E0 for ; Sat, 21 Mar 2020 01:07:02 +1000 (AEST) Received: by mail-ot1-f48.google.com with SMTP id f66so778579otf.9 for ; Fri, 20 Mar 2020 08:07:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=ZXd3FDWkTIQlXUxdsuBSCOtE+29FRgGgV82KpRn9Sjo=; b=FTRj46gpPMugCKEcZT3gvPlQ5+kT/cT0loW28xX6uw9pPQIaEj0Mpd1CVb0zhFBF3w xQd5u7uQeg2LlpvLNCpI0WhA/dzqZ/L1XZv63iQnGSHGvK/ewrFFiGi23SihSpCMUEB2 zvdgmI6gA7hyMW9x4PkTGzr7ds1rjDTZs4eVF6fxImH7oQfYp1ENzhg9Qhpl6IYKTdUG E4BuqseUywrBqZnTisXqqGICsuHStEon/Jpj1UXY13aN1Hr9VvSjcl0xA8fxsvswv+S7 7pju/Ana6zXFPYB0FjhfZFZ4W2eVsNqdQknxvN9AghiTkSLWd/d8XjB+3nIz/QCg1aka H//g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=ZXd3FDWkTIQlXUxdsuBSCOtE+29FRgGgV82KpRn9Sjo=; b=X9Tb4t8Txwp26CylRWZsdunyN7oyzPEMcGvKW8fuEypV8D8AR7cunsJIzrrJ5qcYUg 1qhliaIk6JIBxQ3odQfCIhLJG9yiLTyyB7GlKSSq1B3PRZz0N4jPM4hW1gvyzWHq0SQI AP23eW3Q5SGqqdprJ30lih71slg6TmM7Fhvtr66TA84zzpTTnC6A58j/bkowVCpy6+52 yle1Ukp8BBbh9TP51qtmkw1FrMT+ypZhdjikge4jzOqizwhROmTQsBiuVUVa9ivEPbs2 ZyJ/s3bA5Xshl917HShwJttLEVehPZebiRhYdHUvJ3ueEICQ2dCE6asKU6zMwFvNNrF1 u74A== X-Gm-Message-State: ANhLgQ2ZizE7zrM19SvKxLTG7HRXICVc0JtMCm2h4aJnm5o7rmn/UEjI ab94WKRk72S2OEHNFT5puyd/5tBDQNm8SUHM4G3vQrDq X-Google-Smtp-Source: ADFU+vsOeTDAkmB15Hewyua8BML7y1/mmDgQX207m9jvacmqCG7CpDwuvEVrpw2NZGC/lzAjxr4EWw0kybBh1fgoQe0= X-Received: by 2002:a9d:518e:: with SMTP id y14mr6750318otg.27.1584716821189; Fri, 20 Mar 2020 08:07:01 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:ac9:1892:0:0:0:0:0 with HTTP; Fri, 20 Mar 2020 08:07:00 -0700 (PDT) In-Reply-To: <20200320140308.4FBBB18C073@mercury.lcs.mit.edu> References: <20200320140308.4FBBB18C073@mercury.lcs.mit.edu> From: Nemo Date: Fri, 20 Mar 2020 11:07:00 -0400 Message-ID: To: Noel Chiappa Content-Type: text/plain; charset="UTF-8" Subject: Re: [TUHS] The most surprising Unix programs X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tuhs@minnie.tuhs.org Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On 20/03/2020, Noel Chiappa wrote: > > From: Paul Guertin > > > I teach math in college ... Sometimes, during an exam, a student who > > forgot to bring their calculator will ask if they can borrow mine I > > always say "sure, but you'll regret it" and hand them the calculator > > After wasting one or two minutes, they give it back > > [,,,] > [...] and any reasonably intelligent high-schooler should get it > extremely quickly; just tell them it's just a representational thing, > number number operator instead of number operator number. A former colleague -- electronics engineer, to boot -- told me that he refuses to use RPN calculators because one will not always be available and he does not want to become "dependent" on it. Offsetting that, my wife -- who does not work in a technical field -- swears by her 32S (and still has her 35 somewhere). I have my caculators on my Macs all set to RPN. Perhaps a bit mean of me, but when people were befuddled, I used to say that my calculators used "natural" input. N.