Toshiba Satellite L640D - Figure 1-4-1 Keyboard for US Style; Keyboard

Chapter 1 Hardware Overview
1.4 Keyboard
The Rostock 10ADGkeyboard has two different kinds of placement, here is US style
Keyboard for your reference.
Figure 1-4-1 is a view of the keyboard for US style
Figure 1-4-1 Keyboard for US style
See Appendix E for details of the keyboard layout
Satellite L600D/L640D/L645D, Satellite Pro L600D/Pro L640D/Pro L645D Maintenance Manual (960-Q08)