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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mathstodon.xyz/users/dougmerritt/statuses/114020485421951942">DougMerritt (log😅 = 💧log😄) (dougmerritt@mathstodon.xyz)'s status on Tuesday, 18-Feb-2025 02:50:49 JST</a><a href="https://mathstodon.xyz/@dougmerritt" title="dougmerritt@mathstodon.xyz"><img src="https://gnusocial.jp/avatar/173329-48-20240304150924.webp" width="48" height="48" alt="DougMerritt (log😅 = 💧log😄)" style="position: absolute; left: 0; top: 0;">DougMerritt (log😅 = 💧log😄)</a><div><a href="https://mastodon.sdf.org/@screwtape/114018364438179301" rel="in-reply-to">in reply to</a><ul><li><li><a href="https://gnusocial.jp/user/43067" title="ksaj@infosec.exchange">Karsten Johansson</a></li><li><a href="https://gnusocial.jp/user/130031" title="amszmidt@mastodon.social">Alfred M. Szmidt</a></li></ul></div></section><article><p><a href="https://mastodon.sdf.org/@screwtape">@screwtape</a> <br>Etymology doesn't necessarily prove anything, but it *is* pretty weird that "CAR" was the mnemonic for "Contents of A Register" and "CDR" for "Contents of D Register" -- literal machine registers, not originally an abstraction at all.</p><p>BTW</p><p>&gt; CDR coding was only really used on the Lisp Machine</p><p>That's 100% false.</p><p><a href="https://mastodon.social/@amszmidt">@amszmidt</a> <br><a href="https://infosec.exchange/@ksaj">@ksaj</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/4579953#notice-8970747">In conversation</a><time datetime="2025-02-18T02:50:49+09:00" title="Tuesday, 18-Feb-2025 02:50:49 JST">about 3 months ago</time> <span>from <span><a href="https://mathstodon.xyz/@dougmerritt/114020485421951942" rel="external" title="Sent from mathstodon.xyz via ActivityPub">mathstodon.xyz</a></span></span><a href="https://mathstodon.xyz/@dougmerritt/114020485421951942">permalink</a></footer></blockquote>

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DougMerritt (log😅 = 💧log😄) (dougmerritt@mathstodon.xyz)'s status on Tuesday, 18-Feb-2025 02:50:49 JSTDougMerritt (log😅 = 💧log😄)
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@screwtape
Etymology doesn't necessarily prove anything, but it *is* pretty weird that "CAR" was the mnemonic for "Contents of A Register" and "CDR" for "Contents of D Register" -- literal machine registers, not originally an abstraction at all.
BTW
> CDR coding was only really used on the Lisp Machine
That's 100% false.
@amszmidt
@ksaj
In conversationabout 3 months ago from mathstodon.xyzpermalink

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