Google intended the limited initial rollout to be a test of google glass, that the adopters were Innovators.
The initial rollout of Google Glass was limited, purposefully so as to set the price very high. This mean that only a selected few, and those with plenty of disposable income, would be the first to use these devices. Google required people to register for the chance to receive a set. Even if many would want to spend the money on these devices, Google allowed only a selected few to receive them.
2 4 9
Explanation:
Basically what I thought was the way was, since 2 is first, then its 1, then since 4 is second, it's added second, lastly to get the last oneI added them all and got 9 so that's third.
Answer : communicate is the answer.