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Where did "busy" go? A quiet history of presence, from Schedule+ to Skype to silence

6 June 2026 · 8 min read · By the FreeBusy team

On May 5, 2025, Microsoft pulled the plug on consumer Skype. Twenty-two years after a small team in Tallinn shipped peer-to-peer video calls to a dialup-bound world, the most enduring icon of the desktop era — that green dot — went dark.

We talked a lot about Skype's death. We talked less about what it took with it: the idea that the people who matter to you should be able to glance at a screen and know, instantly, whether you can talk.

This is a short history of that idea — where it came from, why it almost disappeared, and what we lost when it did.

Before the dots: free/busy as a protocol

The idea that a computer should know whether you're available didn't start with chat. It started with calendars.

Microsoft shipped Schedule+ alongside Mail in 1992. By the time Exchange Server 4.0 arrived in 1996, "free/busy lookup" was a built-in feature: open someone's calendar, see colored blocks for the next two weeks, schedule a meeting in the gap. The data was a proprietary binary blob in a public folder, but the abstraction was timeless — how booked am I, without showing you what I'm booked with?

In 1998 the IETF blessed it as a standard. RFC 2445 — the iCalendar specification — defined a component called VFREEBUSY. Its only job was to publish opaque windows of time labeled BUSY, FREE, or TENTATIVE. By Exchange 2000, you could publish your VFREEBUSY to a public web URL, and a colleague using a non-Microsoft calendar could ask politely, in plain text, when you might be free for coffee.

This is the deep root of presence: the recognition that availability and content are different things, and the second is none of anyone's business. The app we are building is named after that recognition.

1996 — ICQ invents the buddy list

ICQ launched in November 1996 and, almost as an afterthought, gave its users six statuses: Online, Free For Chat, Away, Not Available, Occupied, Do Not Disturb. Plus, of course, the always-funny Invisible.

Before ICQ, if you wanted to know whether a friend was at their computer, you sent an email and waited. After ICQ, you opened your buddy list and read the room.

Two design choices from those six statuses still echo three decades later. Free For Chat was a user-initiated request to be interrupted — the digital equivalent of leaving your door open. Do Not Disturb was the inverse: not "I'm offline," but "I'm here and I don't want to talk." Every Slack workspace today carries both of these ideas, mostly unchanged.

1997–2003 — the away-message era

AOL Instant Messenger landed a year later and added an innovation that became a teenage art form: the custom away message. Half of late-90s American adolescence is preserved in fragments of font-tag-coloured Smash Mouth lyrics that someone left up on AIM while they went to dinner.

Yahoo Messenger (1998) elevated the menu — Be Right Back, On the Phone, Stepped Out. MSN Messenger (1999, later Windows Live Messenger) added Out to Lunch and made the Appear Offline trick a household feature. By 2003, when Skype arrived, the vocabulary was settled. Skype just made the dots better.

2003 — Skype's traffic lights

Skype's contribution wasn't to invent presence. It was to reduce it. Green, yellow, red. Available, away, do-not-disturb. A grey dot for offline. A small clock for "I haven't been at the keyboard for a while."

It also distinguished, more clearly than its predecessors, between I'm busy and don't bother me right now. A red dot in Skype meant "I am literally on a call." The toggleable Do Not Disturb meant "I am working and notifications are silent." These are not the same thing, and Skype was the first mass-market app to treat them as separate ideas.

For two decades, that vocabulary was the backbone of remote work. By 2020, a generation of remote employees had internalized the green dot as a kind of social contract: if it's green, you can ping.

The collapse: WhatsApp turns presence into surveillance

And then, sometime around the iPhone, presence quietly died on the consumer side.

WhatsApp launched in 2009 with a different idea. It didn't show you a status; it showed you a timestamp. last seen today at 9:42 PM. You weren't telling anyone how you felt. The app was telling everyone — your friends, your ex, your boss, your stalker — when you had last been holding your phone.

The reception was telling. Within five years, WhatsApp added a privacy toggle to hide "last seen." By 2020, half the users in any given thread had turned it off. There were op-eds about last-seen anxiety. There were marriages strained by green dots. There were stalkers who built entire surveillance routines on top of a single timestamp.

The lesson nobody seemed to internalize: presence is a fundamentally different thing from time-on-device. Skype's green dot was something you set, for the people you chose, in a vocabulary that meant something. WhatsApp's "last seen" was something the network set, for anyone you'd ever talked to, in a vocabulary that meant only "I see you."

Where presence still lives

Presence didn't disappear from the workplace. Slack, Discord, and Teams kept the dots — explicitly modeled on Skype's, in Teams' case, since it inherited Skype's enterprise lineage. Discord even pushed the idea further with "rich presence": your status can show what game you're playing, with art and a join button.

But these are all workplace presence, or gamer presence. For the people you actually love — your family, your partner, your closest friends — the only signal modern apps give you is a timestamp and the fear of being read.

What FreeBusy brings back

FreeBusy is, in part, an argument that consumer presence was a good idea that we abandoned for the wrong reasons.

The abandonment was a reaction to two real problems: surveillance (everyone sees your timestamp) and noise (the online signal stopped meaning anything when you stopped sitting at a desk). FreeBusy's answer is to fix both at the cause:

It's not a new idea. It's the idea that animated Schedule+ in 1992, ICQ in 1996, and Skype's green dot for twenty years. It just needed someone to remember that the thing people quietly liked about presence was never the surveillance — it was the consent.

See FreeBusy →

Notes & sources