MOUNTAIN VIEW – In the year or so since its IPO, LinkedIn has surpassed the 150 million user mark, while growing its staff from about 800 to almost 2,500.

Its headquarters in Mountain View has grown a lot too.

We recently took a tour of LinkedIn's growing campus and got a behind the scenes look at one of the world's largest social networks.

Fridays are now "Food Truck Fridays" on the LinkedIn campus. A bunch of trucks arrive in LinkedIn's central parking lot before lunch time. In about an hour, employees will be lining up. It's a nice change from the free lunches served in the company's indoor cafe.

Lunch time! LinkedIn employees start lining up a bit after 11 a.m. The food truck craze only started a few weeks ago here, but it's a huge hit.

We decided to eat at the curry truck. The curry chicken burrito was fantastic.

Please follow SAI on Twitter and Facebook.