<p>How time flies: Gmail, Google's free email service, turns nine this month and is looking forward to Year 10 and beyond.</p><p>In a blog post, software engineer Zohair Hyder said Gmail has evolved much since it debuted as a invite-only beta on April 1, 2004.</p><p>"Simply put, whether you've been a Gmail user for 9 years or 9 months, your input helps us continue to keep Gmail current and useful. Thanks for taking this journey with us, and onward to year ten!" Hyder said.</p><p>Hyder credited Gmail users for their feedback, which led to many of the positive features on Gmail such as Google-strength search and an efficient anti-spam filter.</p><p><a href="http://www.gmanetwork.com/news/story/303440/scitech/technology/gmail-turns-9">Keep reading...</a></p>