<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: verdana,helvetica,sans-serif; font-size: 10pt; color: #000000'><style>p { margin: 0; }</style><div style="font-family: verdana,helvetica,sans-serif; font-size: 10pt; color: #000000"><br>I thought this was an interesting video about how the phone button layout was finally selected, and why the calculator layout was not selected.<br><br>http://www.youtube.com/watch?v=kCSzjExvbTQ<br><br>Here is the first document they refer to in the video. <br><br>Human Factors Engineering Studies of the Design and Use of Pushbutton Telephone Sets<br><br>http://www3.alcatel-lucent.com/bstj/vol39-1960/articles/bstj39-4-995.pdf<br><br>The second seems to be protected by copyright and is not available easily.<br><br><br><br><div><span></span>---<br>Lelio Fulgenzi, B.A.<br>Senior Analyst, Data Centre and Communications Facilities<br>Computing and Communications Services (CCS)<br>University of Guelph<br><br>519‐824‐4120 Ext 56354<br>lelio@uoguelph.ca<br>www.uoguelph.ca/ccs<br>Room 037, Animal Science and Nutrition Building<br>Guelph, Ontario, N1G 2W1<span></span><br></div><br></div></div></body></html>