When I call up a search subject that begins with a letter that I have
used befor it also lists all previous searches of that letter.  How do
I delete then?

Hi mikrobe,

You can clear the search history of previous searches by following the
procedures below:

"In Internet Explorer 5 or higher, select "Tools" from the menu, then
"Internet Options" and then choose the "Content" tab. Next, look for
the button at the bottom that says "AutoComplete." Click on the button
which will make the AutoComplete Settings window appear. In it, click
on the "Clear Forms" button to delete all your stored form entries."

"If you are a Google Toolbar user, the techniques above won't work to
remove your past searches from the toolbar. Instead, you'll need to
click on the Google logo next to the Google Toolbar's search box, then
choose "Clear Search History" from the drop-down box that appears."


Removing a particular query in the list of past searches:

Click once in the search box and get a "drop down" box to appear,
listing all the things you've searched for in the past. Alternatively,
you can start typing a query, and you'll be shown any queries that
contain the first letters that you've typed.

"Use the arrow keys on your computer keyboard to highlight the
particular entry. Alternatively, highlight the entry using your mouse
but don't click on it. Next, once the entry has been highlighted, push
the "Delete" button on your computer keyword. The entry should
disappear."


Source:
Search Engine Watch: Clearing Your Search History From Google And
Other Search Engines
http://www.searchenginewatch.com/sereport/article.php/2165181


Search criteria:
delete OR clear search history


I hope this helps. If you have any questions regarding my answer
please don?t hesitate to ask before rating it.

Best regards,
Rainbow

rainbow-ga has most excellently covered how to remove IE's
autocomplete history/function, as well as the Google toolbar search
history, assuming you are a user of it.

Bear in mind, however, there are more ways of knowing search history,
as well as internet access history...

Come to think of it, that's the whole darn point of spyware 0_o