I thought you should be aware that David Caminer, one of the people behind LEO, died just over a week ago age 93. 
 
Martin C-K's excellent obituary is at http://www.independent.co.uk/news/obituaries/david-caminer-system-designer-behind-leo-the-worlds-first-business-computer-854283.html?service=Print
 
Alan Cane's obit a couple of days later is at  http://www.ft.com/cms/s/0/d3ade40c-44ab-11dd-b151-0000779fd2ac.html
 
And the NYT yesterday is at  http://www.nytimes.com/2008/06/29/technology/29caminer.html?_r=1&oref=slogin&ref=obituaries&adxnnlx=1214821428-4UmJsQwpWB4qqPO/I%20rhMg&pagewanted=print
 
 
As someone who was a systems analyst working on LEO III mainframe computers in the early 1970s my overriding memory is of hours and hours spent reading out and checking hundreds of pages of numbers with the programmers.  The LEO of course predated compilers.
kind regards
neil
 
 
Dr Roger Neil Barton
Visiting Research Fellow, Institute of Historical Research
http://www.uclmail.net/~neil.barton/