and usegive it a name thehash symbol to did note channel, which is where twitter got the hash tags fromnce to us, we are developing this in the background. it was so irritating to have a problem, and then we would address it in a number of minutes, and we let that kind of cook. so when did you realize that slack was a thing, and glitch was not? moment: there was a later at night, and i had not been able to sleep well. there was always like one more thing we could try that could make a difference, and a little bit too weird, a little bit too esoteric, and i do not believe they can work anymore, so the next morning, i told the board and the cofounders that we had to shut it down. while that was happening, what do we want to do next? and we all said we would not work with the system without this one that we had developed inside the company. maybe that is something other people would want. emily: slack as 3 million paid , 65% fortune 100 companies. stewart: yes. it is not what i expected. the potential seems unlimited. what are they that you outpace your own expectations? i think we are unb