From "LO" to threads

2026-10-29 · The Scrums team

On October 29, 1969, the first message crossed the ARPANET. It was meant to say LOGIN and got as far as LO before the system crashed. Fifty-seven years on, sending messages is easy. Keeping a team's chat calm and findable is the hard part.

At 10:30 pm on October 29, 1969, a student programmer at UCLA, Charley Kline, tried to log in to a computer at the Stanford Research Institute, 350 miles away, over a brand-new network called the ARPANET. He typed L, then O, and the system at the other end crashed. The first message ever sent across what became the internet was "LO".

Fifty-seven years later, sending a message is the easy part. Most teams' problem with chat is the opposite: too many messages, in too many places, interrupting too often, and impossible to find a week later.

What makes team chat work

Threads, so conversations don't tangle. A reply to a question belongs with the question, not twenty messages further down the channel.
A place for what matters. Decisions and important links need to be easy to find again, without scrolling.
Search that actually finds things.
Notifications that respect focus. A message isn't urgent just because it arrived.
A short path to a call. Some conversations need two minutes of talking, not twenty messages.

Chat in Scrums

Channels and direct messages. Every organization has a #general, and anyone can make public or private channels. Direct messages work with one person or up to eight.
Threads. Reply to any message in a thread beside the conversation. Threads lists the ones you follow, with what's new.
Pinned and saved. Pin a message to its conversation for everyone, or save it privately for yourself.
Search across every conversation you're in, with the matching words marked.
Statuses and pauses. Set a status like "In a meeting" until a time you choose, or pause notifications entirely, and people writing to you can see it.
Calls, one click away. Start a voice call from any channel or direct message, and the conversation shows a Join button.

It all sits in the same place as your team's retros, standups and pages, so the conversation about a decision and the decision itself are one search apart.