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[edit] Google AJAX

• Sign-up for an AJAX Search API Key:

  You must have a Google Account to obtain a Google API key, and your API key is tied directly to your Google Account. You can generate multiple API keys for your account if you have multiple web sites.

• Using Google's AJAX APIs
• Google AJAX Search API blog

[edit] Google Maps

• Sign up for a Google Maps API key
• Google Code Home > Google Maps API > Google Maps API Reference
• Google Code Home > Google Maps API > Concepts
• Google Code Home > Google Maps API > Google Maps KML Sitemaps:

  Drive More Search Traffic to Your Maps API Site by Including KML Files in a Sitemap

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• How to Make Use of Google Mail Services