HW 25/22 - Revision history

Admin: /* Conclusion */ grammar, typo

2025-07-22T22:30:20Z

‎Conclusion: grammar, typo

2015-05-03T12:13:35Z

‎The Collator: added diagram

2015-05-03T02:15:00Z

show numbered headings, as in the original

2015-05-02T22:05:25Z

‎The Hollerith Card and Coding: additional note on dimensions.

2015-05-02T18:27:29Z

‎The Hollerith Card and Coding: note on dimensions

2015-04-30T18:59:54Z

Transcript of National Archives document HW25/22

@@ Line 1,904: / Line 1,904: @@
 I am pleased to be able to conclude by reporting that Freeborn was
 awarded an O.B.E. for his contribution to the war effort.
-{{Note|Frederic Victor Freeborn (28 Jan 1897 - 29 Mar 1977) was awarded the O.B.E. in the New Year's Honours List of 1945.<br />Ronald Whelan was himself awarded the M.B.E. in the Queen's Birthday Honours List of 1974.}}
+{{Note|Frederic Victor Freeborn (28 Jan 1897 - 29 Mar 1977) was awarded an O.B.E. in the New Year's Honours List of 1945.<br />Ronald Whelan was himself awarded an M.B.E. in the Queen's Birthday Honours List of 1974.}}
 In the various books recently published which deal with the war-time
@@ Line 1,919: / Line 1,919: @@
 At the end of the war with the setting up of G.C.H.Q. it was proposed
-that a Hollerith installation should be included in he organisation,
+that a Hollerith installation should be included in the organisation,
 together with the personnel who had worked under Freeborn at
 Bletchley, and who might wish to continue in this type of work.  To

@@ Line 498: / Line 498: @@
 ===The Collator===
-{{Note|Probably the BTM equivalent of the [http://www.computerhistory.org/collections/catalog/X1578.98 IBM 077]}}
+{{Note|Probably the BTM equivalent of the [http://www.columbia.edu/cu/computinghistory/collator.html IBM 077]}}
 This machine operated at a speed of 12,000 cycles per hour, a cycle
@@ Line 517: / Line 517: @@
 as shown below.
-{{Note|A blank space was left here in the National Archives copy, presumably intended for the diagram to be drawn in.}}
+{{Note|1=A blank space was left here in the National Archives copy, presumably intended for a diagram to be drawn in.<br />This similar diagram is taken from a 1978 US Navy manual, [http://books.google.com?vid=OCLC5989985 "Digital Computer Basics"].<br /><br />[[File:Collator Card Feed.png]]}}
 As the names imply a card feeding from the Primary Feed could have

← Older revision		Revision as of 02:15, 3 May 2015
Line 1:		Line 1:
		+	__NUMBEREDHEADINGS__
	<font size="4.5">The Use of Hollerith Punched Card Equipment in Bletchley Park</font>		<font size="4.5">The Use of Hollerith Punched Card Equipment in Bletchley Park</font>

@@ Line 156: / Line 156: @@
 inches, having a corner cut at the top right hand end.  Along the
 bottom edge the numbers 1 - 80 identify 80 columnar positions.
-{{Note|Most sources give the dimensions of IBM-standard 80-column cards as 7<sup>'''3'''</sup>/<sub>8</sub>" x 3<sup>1</sup>/<sub>4</sub>".}}
+{{Note|Most sources give the dimensions of IBM-standard 80-column cards as 7<sup>'''3'''</sup>/<sub>8</sub>" x 3<sup>1</sup>/<sub>4</sub>".<br />[http://www.columbia.edu/cu/computinghistory/census-tabulator.html This source] explains that size was chosen for the original Hollerith cards in 1890 so as to use storage boxes intended for US banknotes.}}
 Each
 column can be utilised to record a digital value or a letter by means

@@ Line 155: / Line 155: @@
 The cards are of manila stock, being 7<sup>1</sup>/<sub>8</sub> inches in length by 3<sup>1</sup>/<sub>4</sub>
 inches, having a corner cut at the top right hand end.  Along the
-bottom edge the numbers 1 - 80 identify 80 columnar positions.  Each
+bottom edge the numbers 1 - 80 identify 80 columnar positions.
 column can be utilised to record a digital value or a letter by means
 of a punched hole for a digit, or a pair of holes for a letter in the