Would you please provide me a list of the top contributing companies
as it relates to their support of the miltary and military families. 
In other words, some companies continue to pay the salaries of
reservists and National Guard members when they are called upon to
serve, while they are away at war.

I'd like to know the top 25-50 companies, what they provide, and for how long.

I saw a chart on this not too long ago, but I can't remember where....

Hello again, April! 

Here you'll find a comprehensive, alphabetized list of American
companies that are making an extra effort to support military men and
women and their families, with a brief summary of each company's
policy:

Employer Support of the Guard and Reserve: Outstanding Employers
http://www.esgr.org/employers/outstandingEmployers.asp

This site has also published a good list, including links to the
websites of the companies:

"Many American companies are going beyond the call of their legal
responsibility and helping the men and women called to active duty by
not only paying them the legally-required minimum, but by either
making up the difference between their active-duty stipend and their
usual salary, or even by paying their usual salary in full. Again,
this is no small hardship for these employers; it involves some pretty
major sacrifices. No one has pressured them to do this; no one has
threatened boycotts if they don't. They've done it out of a sense of
duty, decency and patriotism."

The Home Front
http://www.coldfury.com/HF/index.html#anchor

This may also be useful:

USAWOA: Corporate America Supports Military
http://www.usawoa.org/CorpAmerSupportsMilitary.htm

My Google search strategy:

Google Web Search: companies OR corporations support military reservists
://www.google.com/search?hl=en&q=companies+OR+corporations+support+military+reservists

I hope this is precisely what you need. If anything is unclear or
incomplete, or if a link doesn't work for you, please let me know.

Best regards,
pinkfreud