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Actually, "Outlook Web Access" (OWA) was probably the first, since XMLHttpRequest was supposedly added for OWA. Gmail was the first good&popular AJAX-style webm

by paul 20y ago

Actually, "Outlook Web Access" (OWA) was probably the first, since XMLHttpRequest was supposedly added for OWA. Gmail was the first good&popular AJAX-style webmail client, so it helped legitimize and popularize those techniques.