How do you turn off the "history" of google searches?  For example
when I write P everything that starts with P pops up.

Hi there,

I have presumed that you are using Internet Explorer - please ask for
a clarification if it is another browser you are using.
  
If you are visiting the Google website to do your searching, and the
searchbox has your previous enquiries, you can remove them by:
   
1) In IE go to Tools / Internet Options / Content / AutoComplete.   
   
2) Untick the box beside "Forms" (if you wish to deactivate the search
history feature) and click on "Clear Forms" (to clear the current
history).
   
If it is the Google Toolbar you are using:   
   
1) Click on the Google logo to access the drop down menu.    
   
2) Choose the Clear Search History option.  
  
To delete individual entries, use the down arrow key to select
previous search keywords, then press delete to remove a highlighted
entry.
 
To stop the toolbar remembering queries: 
 
1) Click on the Google logo to access the drop down menu.  
 
2) Select Toolbar Options 
 
3) Untick the box next to "Keep a search history in a drop-down list
under the search box"
 
  
Google FAQ:  
://www.google.com/help/faq.html#iehistory  
  
  
Search strategy:   
Personal experience   
   
   
Best wishes,   
robertskelton-ga