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Help tips for this web site

Here are some tips to help you use this web site.

A number of features on the site, including search, require that you enable JavaScript in your browser.

Have you thought about upgrading your browser? Please do if you do not have the latest version (see below).

How do I make the text larger?
Windows: Simultaneously press Ctrl and + keys.
Mac: Simultaneously press Cmd and + keys.
How do I make the text smaller?
Windows: Simultaneously press Ctrl and - keys.
Mac: Simultaneously press Cmd and - keys.
How do I reset the text size to default?
Windows: Simultaneously press Ctrl and 0 keys.
Mac: Simultaneously press Cmd and 0 keys.
Can’t find something?
Try our site search
Also, refer to Site map A and Site map B; they are public indexes of this site.
What browser am I using?
Your browser is: on
Your browser’s user agent string is: CCBot/2.0 (http://commoncrawl.org/faq/)
What's the newest version?
Find newest browser version information here.
I have an antique computer; new browsers won’t install
Use Google search to determine what is the latest version that will run on your operating system
Here is an old version of Firefox. Keep in mind that newest versions of browsers are recommended, if your computer can run them.
Can I have more than one browser on my computer?
Yes. A browser is just another program that runs on your computer; you probably have several programs on your computer already. You can choose any browser to be your default browser. (Windows XP, Vista, 7, 8 | Mac OS X)
Where is the old site?
It’s still here. Clicking on Home on the old site will return you to this new site. Also see the right column for link to the old site.
How do I open pdf documents?
Adobe Reader software is available, free, for most operating systems. Get Reader.