21/3aTANGENT
Ideas don’t arrive in order.
They arrive while you’re doing something else. File them anyway — the address, not the timing, is what makes a thought findable later. On addresses, see .
TANGENTcard index for the mind
ACC. NO. 0001 · PERMANENT COLLECTION
A filing system for thoughts you intend to keep.
Tangent is a note-taking app built like a card index: every thought gets a card, every card gets an address, and any address can point to another. Niklas Luhmann kept ninety thousand of these and called the box his second memory. Yours types faster.
↑ a working sample — click an address to pull its card
The filing rules
One thought per card.
A global hotkey, a blank card, two seconds. No titles required, no folder to choose, nothing to decide while the thought is still warm.
Link by address, not by mood.
Type [[ and point a card at any other. Links run both ways, so every card quietly lists everyone who has ever cited it.
The box deals you old cards.
Each morning Tangent resurfaces a few cards beside whatever you’re writing. Most you’ll dismiss. The third one is why you keep a box.
FROM THE ARCHIVE
The sociologist Niklas Luhmann published seventy books and some four hundred articles. Asked how, he answered — politely, and more than once — that he didn’t do it alone: the card index did most of the work. He wrote his slips, filed them by address, and let the box surprise him.
He called it his Zweitgedächtnis — second memory. He also admitted it was a better conversation partner than most colleagues.
— filed 1981, retrieved whenever needed
Thoughts not filed are due to disappear.
Start your file — freeLocal-first. Plain text. The box lives on your machine.