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		<id>http://fileformats.archiveteam.org/index.php?action=history&amp;feed=atom&amp;title=PostBar</id>
		<title>PostBar - Revision history</title>
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		<updated>2026-08-10T06:08:41Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>http://fileformats.archiveteam.org/index.php?title=PostBar&amp;diff=12718&amp;oldid=prev</id>
		<title>Dan Tobias at 22:24, 28 July 2013</title>
		<link rel="alternate" type="text/html" href="http://fileformats.archiveteam.org/index.php?title=PostBar&amp;diff=12718&amp;oldid=prev"/>
				<updated>2013-07-28T22:24:38Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
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			&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
			&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 22:24, 28 July 2013&lt;/td&gt;
			&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 6:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 6:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;'''PostBar''' is one of the bar code systems used by Canada Post for mail sorting, along with [[CPC Binary]]. While CPC Binary is printed in a special ultraviolet-fluorescent ink, PostBar is a more &amp;quot;normal&amp;quot; black-ink-printed bar code. Like the [[Intelligent Mail barcode]] used by the USPS, PostBar uses bars which vary in length and in positioning (with ascenders and descenders from the base position), but has its own coding system for the meanings of the bars. [[Reed-Solomon error correction]] is used. Similar systems are used in other countries' postal systems, including Australia Post.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;'''PostBar''' is one of the bar code systems used by Canada Post for mail sorting, along with [[CPC Binary]]. While CPC Binary is printed in a special ultraviolet-fluorescent ink, PostBar is a more &amp;quot;normal&amp;quot; black-ink-printed bar code. Like the [[Intelligent Mail barcode]] used by the USPS, PostBar uses bars which vary in length and in positioning (with ascenders and descenders from the base position), but has its own coding system for the meanings of the bars. [[Reed-Solomon error correction]] is used. Similar systems are used in other countries' postal systems, including Australia Post.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;This sort of bar code system is regarded as &amp;quot;four-state&amp;quot; because there are four types of bars, classified by presence of ascenders and/or descenders.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;This sort of bar code system is regarded as &amp;quot;four-state&amp;quot; because there are four types of bars, classified by presence of ascenders and/or descenders&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;. This sort of system is transcribable using [[DAFT]] notation&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;== Links ==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;== Links ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Dan Tobias</name></author>	</entry>

	<entry>
		<id>http://fileformats.archiveteam.org/index.php?title=PostBar&amp;diff=12306&amp;oldid=prev</id>
		<title>Dan Tobias: Created page with &quot;{{FormatInfo |formattype=physical |subcat=Bar codes }}  '''PostBar''' is one of the bar code systems used by Canada Post for mail sorting, along with CPC Binary. While CPC...&quot;</title>
		<link rel="alternate" type="text/html" href="http://fileformats.archiveteam.org/index.php?title=PostBar&amp;diff=12306&amp;oldid=prev"/>
				<updated>2013-06-29T15:29:03Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;{{FormatInfo |formattype=physical |subcat=Bar codes }}  &amp;#039;&amp;#039;&amp;#039;PostBar&amp;#039;&amp;#039;&amp;#039; is one of the bar code systems used by Canada Post for mail sorting, along with &lt;a href=&quot;/wiki/CPC_Binary&quot; title=&quot;CPC Binary&quot;&gt;CPC Binary&lt;/a&gt;. While CPC...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{FormatInfo&lt;br /&gt;
|formattype=physical&lt;br /&gt;
|subcat=Bar codes&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
'''PostBar''' is one of the bar code systems used by Canada Post for mail sorting, along with [[CPC Binary]]. While CPC Binary is printed in a special ultraviolet-fluorescent ink, PostBar is a more &amp;quot;normal&amp;quot; black-ink-printed bar code. Like the [[Intelligent Mail barcode]] used by the USPS, PostBar uses bars which vary in length and in positioning (with ascenders and descenders from the base position), but has its own coding system for the meanings of the bars. [[Reed-Solomon error correction]] is used. Similar systems are used in other countries' postal systems, including Australia Post.&lt;br /&gt;
&lt;br /&gt;
This sort of bar code system is regarded as &amp;quot;four-state&amp;quot; because there are four types of bars, classified by presence of ascenders and/or descenders.&lt;br /&gt;
&lt;br /&gt;
== Links ==&lt;br /&gt;
* [[Wikipedia:PostBar|Wikipedia article]]&lt;br /&gt;
* [http://www.canadapost.ca/cpo/mc/business/productsservices/atoz/recognizedpresortationsoftware.jsf?ecid=murl08003858&amp;amp;LOCALE=en Canada Post: Recognized Presortation and Bar Code Recognition Software]&lt;br /&gt;
* [http://auspost.com.au/media/documents/a-guide-to-printing-the-4state-barcode-v31-mar2012.pdf Guide to printing 4-state bar code (Australia Post)]&lt;br /&gt;
* [http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&amp;amp;Sect2=HITOFF&amp;amp;d=PALL&amp;amp;p=1&amp;amp;u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&amp;amp;r=1&amp;amp;f=G&amp;amp;l=50&amp;amp;s1=5602382.PN.&amp;amp;OS=PN US Patent 5,602,382]&lt;/div&gt;</summary>
		<author><name>Dan Tobias</name></author>	</entry>

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