WAP-7 - तेरे जैसा यार कहाँ , कहाँ ऐसा याराना , याद करेगी दुनियां तेरा मेरा अफसाना. - Arjun Rai

Thanks for your interest.
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The launch of the site and other such details are rather mundane and uninteresting. There is no specific "launch date", but since 2010 , we informally celebrate Aug 11 as the site's birthday. Otherwise, there is no exciting growth trajectory or other colourful things to write about. The site remains rather small and non-serious, focused on our RailFan community. On the face of it, there doesn't seem to be any material to fill in an "About Us" page.
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However, we DO have a lot of RICH Social History, Myths, Legends, Evolution of our numerous Features, Admin appointments, Issues/Bugs, Outages, Legendary past Members and so forth, associated with IRI's past. Also, starting soon, we may organize (resource permitting) RailFan meets, which will only add to the above.
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So yes, there is a lot of unconventional "About Us" material, which may make for interesting reading.
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One of our Admins took the initiative and submitted an "About Us" page a few months ago. Other enterprising members have also submitted informal essays in the past.
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We may create a compendium of the above, to kick off a separate "About Us" section. Thereafter, we shall allow members themselves to post their own reflections, nostalgia, when they joined the site, which members helped them the most and other tidbits to discuss in the new "About Us" section.
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Thanks.