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	<title>Calculating</title>
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		<title>Calculating</title>
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		<title>War Gases Wheel Chart</title>
		<link>http://calculating.wordpress.com/2012/01/23/war-gases-wheel-chart/</link>
		<comments>http://calculating.wordpress.com/2012/01/23/war-gases-wheel-chart/#comments</comments>
		<pubDate>Mon, 23 Jan 2012 19:07:57 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Calculators]]></category>
		<category><![CDATA[History]]></category>
		<category><![CDATA[calculators]]></category>
		<category><![CDATA[history]]></category>
		<category><![CDATA[volvelle]]></category>
		<category><![CDATA[war gases]]></category>
		<category><![CDATA[wheel chart]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=769</guid>
		<description><![CDATA[Prior to the start of the Second World War the British Government thought that German bombing would be more devastating than it actually was. They also thought that the Germans would use chemical warfare and drop gas bombs on British &#8230; <a href="http://calculating.wordpress.com/2012/01/23/war-gases-wheel-chart/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=769&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">mrslippery</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2012/01/ww2-gas-attack.png" medium="image">
			<media:title type="html">WW2 gas attack</media:title>
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			<media:title type="html">churchmans arp</media:title>
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			<media:title type="html">churchmans arp set</media:title>
		</media:content>

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			<media:title type="html">War Gases phamplet 01</media:title>
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			<media:title type="html">War Gases phamplet 02</media:title>
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			<media:title type="html">War Gases Wheel 01</media:title>
		</media:content>
	</item>
		<item>
		<title>An alien message in our DNA</title>
		<link>http://calculating.wordpress.com/2012/01/14/a-message-in-our-dna/</link>
		<comments>http://calculating.wordpress.com/2012/01/14/a-message-in-our-dna/#comments</comments>
		<pubDate>Sat, 14 Jan 2012 22:30:07 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Misc]]></category>
		<category><![CDATA[misc]]></category>
		<category><![CDATA[science fiction]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=738</guid>
		<description><![CDATA[The BBC&#8217;s World Service Discovery programme [podcast] recently broadcast a piece on SETI and the Drake Equation. This included a segment [at 13 minutes into the podcast] from Professor Paul Davies [link  link] about his theory that our genes may &#8230; <a href="http://calculating.wordpress.com/2012/01/14/a-message-in-our-dna/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=738&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">mrslippery</media:title>
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			<media:title type="html">starship</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2012/01/alien-message-in-genes-01.jpg" medium="image">
			<media:title type="html">Alien message in genes 01</media:title>
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			<media:title type="html">Alien message in genes 02</media:title>
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		<item>
		<title>Three Nestler Cold War Calculators</title>
		<link>http://calculating.wordpress.com/2012/01/11/three-nestler-cold-war-calculators/</link>
		<comments>http://calculating.wordpress.com/2012/01/11/three-nestler-cold-war-calculators/#comments</comments>
		<pubDate>Wed, 11 Jan 2012 15:46:00 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Calculators]]></category>
		<category><![CDATA[Cold War Calculators]]></category>
		<category><![CDATA[calculators]]></category>
		<category><![CDATA[cold war]]></category>
		<category><![CDATA[history]]></category>
		<category><![CDATA[volvelle]]></category>
		<category><![CDATA[wheel chart]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=643</guid>
		<description><![CDATA[These cold war calculators were produced by the West German slide rule manufacturer,  Nestler. All three appear to be designed for military use, rather than civil defence or war gaming purposes. Commander&#8217;s Weapons Effect Estimator The Commander&#8217;s Weapons Effect Estimator &#8230; <a href="http://calculating.wordpress.com/2012/01/11/three-nestler-cold-war-calculators/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=643&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<media:content url="http://calculating.files.wordpress.com/2011/12/nestler-commanders-weapons-effect-estimator-front.jpg" medium="image">
			<media:title type="html">Nestler Commanders Weapons Effect Estimator - Front</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/nestler-commanders-weapons-effect-estimator-back.jpg" medium="image">
			<media:title type="html">Nestler Commanders Weapons Effect Estimator - Back</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/nestler-commanders-fallout-predictor-front.jpg" medium="image">
			<media:title type="html">Nestler Commanders Fallout Predictor - Front</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/nestler-commanders-fallout-predictor-back.jpg" medium="image">
			<media:title type="html">Nestler Commanders Fallout Predictor - Back</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/nestler-commanders-radiation-guide-front.jpg" medium="image">
			<media:title type="html">Nestler Commanders Radiation Guide - Front</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/nestler-commanders-radiation-guide-back.jpg" medium="image">
			<media:title type="html">Nestler Commanders Radiation Guide - Back</media:title>
		</media:content>
	</item>
		<item>
		<title>BRL Nuclear Weapons Effects Computers 1, 2 and 3</title>
		<link>http://calculating.wordpress.com/2012/01/04/brl-nuclear-weapons-effects-computers-1-2-and-3/</link>
		<comments>http://calculating.wordpress.com/2012/01/04/brl-nuclear-weapons-effects-computers-1-2-and-3/#comments</comments>
		<pubDate>Wed, 04 Jan 2012 20:05:45 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Calculators]]></category>
		<category><![CDATA[Cold War Calculators]]></category>
		<category><![CDATA[calculators]]></category>
		<category><![CDATA[cold war]]></category>
		<category><![CDATA[volvelle]]></category>
		<category><![CDATA[wheel chart]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=618</guid>
		<description><![CDATA[Nuclear weapons effects computers one and two were produced by  Blundell Rules Limited [BRL] of Weymouth, England.   They have BRLs name on the back. Number 1 dates from about 1960. They could be used calculate the  consequences of a nuclear &#8230; <a href="http://calculating.wordpress.com/2012/01/04/brl-nuclear-weapons-effects-computers-1-2-and-3/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=618&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<media:content url="http://calculating.files.wordpress.com/2011/12/nuclear-weapons-effects-computer-no-1.jpg" medium="image">
			<media:title type="html">Nuclear Weapons Effects Computer - No 1</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/nuclear-weapons-effects-computer-no-2.jpg" medium="image">
			<media:title type="html">Nuclear Weapons Effects Computer - No 2</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/nuclear-weapons-effects-computer-no-3.jpg" medium="image">
			<media:title type="html">Nuclear Weapons Effects Computer - No 3</media:title>
		</media:content>
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		<item>
		<title>Forgotten History</title>
		<link>http://calculating.wordpress.com/2011/12/31/forgotten-history/</link>
		<comments>http://calculating.wordpress.com/2011/12/31/forgotten-history/#comments</comments>
		<pubDate>Sat, 31 Dec 2011 14:55:24 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[History]]></category>
		<category><![CDATA[history]]></category>
		<category><![CDATA[pocket calculators]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=682</guid>
		<description><![CDATA[I will keep updating this list of objects or practices which were once common but  rarely or never appear in books, films or on TV. 1.    Addiators &#8211; mechanical pocket calculators.  These were made by the hundreds of thousands up &#8230; <a href="http://calculating.wordpress.com/2011/12/31/forgotten-history/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=682&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<title>Strange History &#8211; Moonlight towers</title>
		<link>http://calculating.wordpress.com/2011/12/31/strange-history-moonlight-towers/</link>
		<comments>http://calculating.wordpress.com/2011/12/31/strange-history-moonlight-towers/#comments</comments>
		<pubDate>Sat, 31 Dec 2011 14:47:46 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[History]]></category>
		<category><![CDATA[history]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=679</guid>
		<description><![CDATA[The excellent Low-tech Magazine has a fascinating article on moonlight towers. In the early days of electric street lighting it was difficult and expensive to install street lamps similar to those we know now. Instead, many cities installed moonlight towers. &#8230; <a href="http://calculating.wordpress.com/2011/12/31/strange-history-moonlight-towers/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=679&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">mrslippery</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/moonlamp.jpg" medium="image">
			<media:title type="html">moonlamp</media:title>
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		<item>
		<title>Space elevators and other ideas from science fiction</title>
		<link>http://calculating.wordpress.com/2011/12/30/space-elevators-and-other-ideas-from-science-fiction/</link>
		<comments>http://calculating.wordpress.com/2011/12/30/space-elevators-and-other-ideas-from-science-fiction/#comments</comments>
		<pubDate>Fri, 30 Dec 2011 20:46:24 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Misc]]></category>
		<category><![CDATA[misc]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=671</guid>
		<description><![CDATA[Click on this link for a list of ten significant technological concepts which had their popular origins in the world of sci-fi. In some cases, a science fiction source was not necessarily the actual originator, but was influential in bringing &#8230; <a href="http://calculating.wordpress.com/2011/12/30/space-elevators-and-other-ideas-from-science-fiction/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=671&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">mrslippery</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/spaceelevator.jpg" medium="image">
			<media:title type="html">SpaceElevator</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/sunchemist1.jpg" medium="image">
			<media:title type="html">sunchemist1</media:title>
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		<item>
		<title>eBay locks my account</title>
		<link>http://calculating.wordpress.com/2011/12/28/ebay-locks-my-account/</link>
		<comments>http://calculating.wordpress.com/2011/12/28/ebay-locks-my-account/#comments</comments>
		<pubDate>Wed, 28 Dec 2011 13:50:47 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Misc]]></category>
		<category><![CDATA[misc]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=653</guid>
		<description><![CDATA[Recently I received an email from eBay. &#8220;Your eBay account has been temporarily locked because it looks like someone used it without your permission. Your email address may have also been tampered with so you might not have received any &#8230; <a href="http://calculating.wordpress.com/2011/12/28/ebay-locks-my-account/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=653&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">mrslippery</media:title>
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		<title>Atomic Bomb Testing Time Conversion Computer</title>
		<link>http://calculating.wordpress.com/2011/12/27/atomic-bomb-testing-time-conversion-computer/</link>
		<comments>http://calculating.wordpress.com/2011/12/27/atomic-bomb-testing-time-conversion-computer/#comments</comments>
		<pubDate>Tue, 27 Dec 2011 22:17:55 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Calculators]]></category>
		<category><![CDATA[Cold War Calculators]]></category>
		<category><![CDATA[calculators]]></category>
		<category><![CDATA[cold war]]></category>
		<category><![CDATA[volvelle]]></category>
		<category><![CDATA[wheel chart]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=612</guid>
		<description><![CDATA[In October 18, 1947 the U.S. Secretary of Defence established Joint Task Force Seven for the purpose of readying the Eniwetok Atoll for use as a atomic bomb test site.  The task force included representatives from the Atomic Energy Commission, research &#8230; <a href="http://calculating.wordpress.com/2011/12/27/atomic-bomb-testing-time-conversion-computer/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=612&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">mrslippery</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/operationsandstoneapril1948.png?w=188" medium="image">
			<media:title type="html">OperationSandstoneApril1948</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/task-force-seven-time-conversion-computer-011.jpg" medium="image">
			<media:title type="html">Task Force Seven Time Conversion Computer 01</media:title>
		</media:content>

		<media:content url="http://calculating.files.wordpress.com/2011/12/task-force-seven-time-conversion-computer-02.jpg" medium="image">
			<media:title type="html">Task Force Seven Time Conversion Computer 02</media:title>
		</media:content>
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		<item>
		<title>The Wordstar story</title>
		<link>http://calculating.wordpress.com/2011/12/27/the-wordstar-story/</link>
		<comments>http://calculating.wordpress.com/2011/12/27/the-wordstar-story/#comments</comments>
		<pubDate>Tue, 27 Dec 2011 21:39:23 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Computing]]></category>
		<category><![CDATA[computing]]></category>
		<category><![CDATA[history]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=633</guid>
		<description><![CDATA[Only three PC word processing applications have had a dominant market share since 1978.  The first was Wordstar from MicroPro.  I used it until the company faltered in its development programme and made some poor strategic decisions. I, and most &#8230; <a href="http://calculating.wordpress.com/2011/12/27/the-wordstar-story/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=633&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/wordstar.gif" medium="image">
			<media:title type="html">WorDSTAR</media:title>
		</media:content>
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		<item>
		<title>Nuclear Effects Estimator</title>
		<link>http://calculating.wordpress.com/2011/12/26/nuclear-effects-estimator/</link>
		<comments>http://calculating.wordpress.com/2011/12/26/nuclear-effects-estimator/#comments</comments>
		<pubDate>Mon, 26 Dec 2011 19:42:39 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Calculators]]></category>
		<category><![CDATA[Cold War Calculators]]></category>
		<category><![CDATA[calculators]]></category>
		<category><![CDATA[cold war]]></category>
		<category><![CDATA[volvelle]]></category>
		<category><![CDATA[wheel chart]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=604</guid>
		<description><![CDATA[The calculator is 190mm [7.5in] in diameter. Its three disks are made of metal, probably aluminium.One side can be used to calculate the effect on people, structures and military equipment of an air burst nuclear weapon.  An air burst occurs &#8230; <a href="http://calculating.wordpress.com/2011/12/26/nuclear-effects-estimator/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=604&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/nuclear-effects-estimator-air-burst.jpg" medium="image">
			<media:title type="html">Nuclear Effects Estimator - Air Burst</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/nuclear-effects-estimator-surface-burst.jpg" medium="image">
			<media:title type="html">Nuclear Effects Estimator - Surface Burst</media:title>
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		<title>Discounted Cash Flow Slide Rule</title>
		<link>http://calculating.wordpress.com/2011/12/23/discounted-cash-flow-slide-rule/</link>
		<comments>http://calculating.wordpress.com/2011/12/23/discounted-cash-flow-slide-rule/#comments</comments>
		<pubDate>Fri, 23 Dec 2011 23:27:39 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Calculators]]></category>
		<category><![CDATA[calculators]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=594</guid>
		<description><![CDATA[Discounted cash flow is an accountants technique for calculating the discounted present value of returns from a prospective investment. The  rule is 310mm x 76mm and is marked as copyright by the Standard Oil Company of Chicago, Illinois in 1962.  &#8230; <a href="http://calculating.wordpress.com/2011/12/23/discounted-cash-flow-slide-rule/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=594&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<media:content url="http://calculating.files.wordpress.com/2011/12/discounted-cash-flow-slide-rule-front2.jpg?w=1024" medium="image">
			<media:title type="html">Discounted Cash Flow Slide Rule - Front</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/discounted-cash-flow-slide-rule-back1.jpg?w=1024" medium="image">
			<media:title type="html">Discounted Cash Flow Slide Rule - Back</media:title>
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		<title>RAF Nuclear Defence Damage &amp; Casualty Estimator</title>
		<link>http://calculating.wordpress.com/2011/12/18/raf-nuclear-defence-damage-casualty-estimator/</link>
		<comments>http://calculating.wordpress.com/2011/12/18/raf-nuclear-defence-damage-casualty-estimator/#comments</comments>
		<pubDate>Sun, 18 Dec 2011 14:35:35 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Calculators]]></category>
		<category><![CDATA[Cold War Calculators]]></category>
		<category><![CDATA[calculators]]></category>
		<category><![CDATA[cold war]]></category>
		<category><![CDATA[volvelle]]></category>
		<category><![CDATA[wheel chart]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=574</guid>
		<description><![CDATA[A cold war calculator used by the UK&#8217;s Royal Air Force. Tagged: calculators, cold war, volvelle, wheel chart<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=574&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">mrslippery</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/raf-nuclear-defence-estimator-01.jpg?w=147" medium="image">
			<media:title type="html">RAF Nuclear Defence Estimator  01</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/raf-nuclear-defence-estimator-02.jpg?w=150" medium="image">
			<media:title type="html">RAF Nuclear Defence Estimator  02</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/12/raf-nuclear-defence-estimator-03.jpg?w=150" medium="image">
			<media:title type="html">RAF Nuclear Defence Estimator  03</media:title>
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		<item>
		<title>Business Applications of Encryption – Part 1</title>
		<link>http://calculating.wordpress.com/2011/12/10/business-applications-of-encryption-part-1/</link>
		<comments>http://calculating.wordpress.com/2011/12/10/business-applications-of-encryption-part-1/#comments</comments>
		<pubDate>Sat, 10 Dec 2011 21:42:51 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Computing]]></category>
		<category><![CDATA[authentication]]></category>
		<category><![CDATA[business]]></category>
		<category><![CDATA[history]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=523</guid>
		<description><![CDATA[This posting is the first in a series about the commercial applications of encryption. The postings will explain how encryption works, how it can be used in business, and its legal status. It was once only of concern to diplomats, &#8230; <a href="http://calculating.wordpress.com/2011/12/10/business-applications-of-encryption-part-1/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=523&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/encrypt011.jpg" medium="image">
			<media:title type="html">encrypt01</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/encrypt021.jpg" medium="image">
			<media:title type="html">encrypt02</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/encrypt03.jpg" medium="image">
			<media:title type="html">encrypt03</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/encrypt04.jpg" medium="image">
			<media:title type="html">encrypt04</media:title>
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		<item>
		<title>Calculators for computers</title>
		<link>http://calculating.wordpress.com/2011/11/23/calculators-for-computers/</link>
		<comments>http://calculating.wordpress.com/2011/11/23/calculators-for-computers/#comments</comments>
		<pubDate>Wed, 23 Nov 2011 20:42:11 +0000</pubDate>
		<dc:creator>John Aubrey</dc:creator>
				<category><![CDATA[Calculators]]></category>
		<category><![CDATA[calculators]]></category>
		<category><![CDATA[history]]></category>

		<guid isPermaLink="false">http://calculating.wordpress.com/?p=490</guid>
		<description><![CDATA[The early computers were suitable for large scale data processing but not for small scale, ad hoc calculations. These were still performed using mental arithmetic, slide rules, mechanical calculators such as addiators and many other devices. Pre-printed tables were widely &#8230; <a href="http://calculating.wordpress.com/2011/11/23/calculators-for-computers/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=calculating.wordpress.com&amp;blog=1738265&amp;post=490&amp;subd=calculating&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">ready reckoner</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/addiator.jpg?w=126" medium="image">
			<media:title type="html">Addiator</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/ibm-hexadecimal-adder.jpg?w=300" medium="image">
			<media:title type="html">IBM Hexadecimal Adder</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/hexadaisy.jpg?w=300" medium="image">
			<media:title type="html">Hexadaisy</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/hex-adder.jpg?w=52" medium="image">
			<media:title type="html">Hex Adder</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/hexadat.jpg?w=84" medium="image">
			<media:title type="html">Hexadat</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/octadat.jpg?w=82" medium="image">
			<media:title type="html">Octadat</media:title>
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		<media:content url="http://calculating.files.wordpress.com/2011/11/punched-card-load-calculator.jpg?w=300" medium="image">
			<media:title type="html">punched card load calculator</media:title>
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