From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 16669 invoked from network); 16 Nov 2021 19:51:28 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 16 Nov 2021 19:51:28 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id D053B9C881; Wed, 17 Nov 2021 05:51:26 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 8D5A49C83D; Wed, 17 Nov 2021 05:49:25 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=dartmouth.edu header.i=@dartmouth.edu header.b="xkj5VdN5"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 1B1DB9C83D; Wed, 17 Nov 2021 05:49:23 +1000 (AEST) Received: from mail-wr1-f41.google.com (mail-wr1-f41.google.com [209.85.221.41]) by minnie.tuhs.org (Postfix) with ESMTPS id E074F9C2E5 for ; Wed, 17 Nov 2021 05:49:21 +1000 (AEST) Received: by mail-wr1-f41.google.com with SMTP id d24so83679wra.0 for ; Tue, 16 Nov 2021 11:49:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dartmouth.edu; s=google1; h=mime-version:from:date:message-id:subject:to; bh=jF+oVk0lkK2dUHxmF0UWyOXn3lKk32YSvlRQfuTq1bY=; b=xkj5VdN5zPQgCyUx4bW6TcKDHNdDQaZumJzFJhXN6YqNOViDu4ac0z508LVjy+LMuh Z3gfBRAt8p4yJIHmZs58l0g+PzP4T8gQYHb3lv1MTcQk4YakYrSeRPSyQ/YBNG7W/oKI ygPaMJ3/N6D0feeeAtdyGirWdJZTbGevA+CL5zG8ZbEbPJAvjfp0vttNC1MH1m4Ht8jR AfLLUqvcjoFZvflnYgAuAakSpyZArO/92+WRixtSXyxLA1rw0aq4R+N3hfqQCfd1Kx9A /5Dj6JBDaSMLu0sfD+66VnfdEfUz/kEcdGHW7siY9OKBhRxj2YFG+veER4XWt5FvEYBo le1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=jF+oVk0lkK2dUHxmF0UWyOXn3lKk32YSvlRQfuTq1bY=; b=Mur5rAY6KHEVlYPDwUKJXaRZXIqoNr89RSqfxr8y4aC1a7mmq9BmJsUWYkCaN24VMI FxlhwlguyZi5HrfiLDa5n3Tc1Ab9WoFuT8N6IRi+e9eSpmw5jRWizDHf55U0HP1qZGMx qhpeElU64QpGg8W+y1OJ025NIFPchHOwt0JPP5vJ0g0AWBRBzNkNMwnYcRyK8p6dwiAM zFgsBj0hlEPu5gj/7aVwe4jjzEHr56rI7ieK7l0MHeeGSPZa7oc1ePf3VVK9Ps5RJBjq T0lII0ykNsItMNjDKPEAO6lLDKtXjMYZ/pl78iEZqyAzv8k2nOFgK9q08ZLlhiAZZpOH kw4A== X-Gm-Message-State: AOAM533awDvy6KixchljgAGGrtqOcp6HHWoD52yYneqjVDyAfefTEXTn 0OY+loPd77yLYfsphCp3RCa1aCNbMGgbm1JSJJ6u/Q0nsC+9mQ== X-Google-Smtp-Source: ABdhPJzukoEZVdy200MpfY3KEh7GqkgwKgT4u0sU19UUpmkcbcx0c/oXGG15kGpdjztftRR37P+caYUAotFrivtBho0= X-Received: by 2002:a5d:6d88:: with SMTP id l8mr12166472wrs.270.1637092160481; Tue, 16 Nov 2021 11:49:20 -0800 (PST) MIME-Version: 1.0 From: Douglas McIlroy Date: Tue, 16 Nov 2021 14:49:05 -0500 Message-ID: To: jfoust@threedee.com, TUHS main list Content-Type: text/plain; charset="UTF-8" Subject: Re: [TUHS] Book Recommendation 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: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" >>I take credit as a go-between, not as an inventor. Ken Knowlton >>introduced the notation ABC in BEFLIX, a pixel-based animation >>language. > In BEFLIX, 'ABC' meant what, exactly? Offsets from pixel locations? It meant exactly what A->B->C means in C. Pixels had properties, represented in data structures. One valid data type was pointer. Incidentally, another BEFLIX innovation was the buddy system for dynamic storage allocation. Doug