AARP About this site: The AARP (formerly the American Association of Retired Persons) is the nation's leading organization for people 50 and older, providing information, advocacy, and services. The well-organized, large-print Web site has plenty of helpful information for an active and healthy lifestyle. Get tips for long-distance grandparenting, learn how to get your finances in order, and find out what to do if your HMO drops out of Medicare. (http://www.aarp.org/)   Pluses: The current issue of the organization's magazine, Modern Maturity, is available online.   Minuses: The site map is buried on the search page.   Best feature: Read these helpful tutorials, and you'll never be intimidated by your computer again!

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