Previously: Slack co-founder & CTO

San Francisco, CA
Cal Henderson retweeted
when you scroll your phone: how sad. mindless. no inner life to speak of when i scroll my phone: haha! i am learning so much at an astonishing speed. these jokes are so unique
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I've updated my 2025 reading list with the 121 books I read in the year. Highlights were The Thursday Murder Club by @richardosman, Piranesi by @susannaclarke_, The Repeat Room by Jesse Ball and Little Eyes by @sschweblin. iamcal.com/misc/reading-list…
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Cal Henderson retweeted
I apologise for the delayed response to your email, I have enormous personal flaws that I refuse to work on
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Cal Henderson retweeted
wikitok.vercel.app/ It's 2:00 AM Who wants infinite scrolling wikipedia!!
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I've updated my 2024 reading list with the 88 books I read in the year. Highlights were Oryx and Crake by @MargaretAtwood, The Husbands by @hollygramazio and Dungeon Crawler Carl by @mattdinniman iamcal.com/misc/reading-list…
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Cal Henderson retweeted
made a map that lets you discover wikipedia pages around the world 🗺️📌
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Cal Henderson retweeted
choosing to open the twitter app again
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Cal Henderson retweeted
The calories aren’t empty if they are filled with joy
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Cal Henderson retweeted
Just read an article I’ve had open in my tabs for four months. Anything is possible!!! Keep going! You can do it!!!!
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Happy 10th birthday to Slack 🎉 Happy 20th birthday to Flickr 🎉 Time for me to take a little break 😅
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I've updated my 2023 reading list with the 105 books I read in the year. Highlights were The Future, by @NaomiAllthenews, Station Eternity by @mightymur and Titanium Noir by @Harkaway iamcal.com/misc/reading-list…
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Cal Henderson retweeted
i've been going through the tabs i left open "to read later" and actually reading them so that i can close them, but this is actually increasing the overall number of tabs
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Cal Henderson retweeted
When you have back to back meetings
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Cal Henderson retweeted
Sorry I haven't been checking DMs it's just that I don't want to and you can't make me
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This is so much fun!
sf friends, here's my lil' challenge for you: what % of san francisco's street network can you name from memory? carvin.github.io/sf-street-n… just start typing names and press enter :)
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Cal Henderson retweeted
so sorry for my delay in getting back with you! I have been beset by calamities
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Cal Henderson retweeted
The Locus Awards are coming up! We are thrilled to announce @Iamcal, co-founder/CTO of @slackHQ, will sponsor #LocusAwards for 2023 & 2024. locusmag.com/2023-locus-awar…

ALT Headshot of Cal Henderson with quote reading I love science fiction as a vision of what we could become in the future and as a way to talk about the problems facing the world today

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Cal Henderson retweeted
Parens are for (I mean this as a joke (yet a joke I agree with (more or less) right now) please understand) nerds.
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Ok, maybe 3D printing is actually really cool
Allow me to introduce you to the most ridiculous yet amazing thing you will see this week.
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