# Tumble Cards > Cards from the almanac pool: self-contained, verifiable objects with permanent identities. > > Every card has a permanent identity (DNA, 64 characters) and machine-readable > neighbours: card.json and card.md next to its index.html (also advertised via > ). Verify any card at https://tumblecard.com/verify/?dna= — > client-side, against the signed manifest. ## Cards - [The Elements — Cards — Tumble Cards](https://tumblecard.com/card.md): Ten cards that explain the card system by being it: two sides, a DNA, a number, a world, a stack, a seal, a compass, a living side, a file for your AI, and paper. - [Two sides — Tumble Cards](https://tumblecard.com/tum-two-sides-gtctgtcgagctaagcacccttgatattctcgcctccgcaaaacggacagcgacgttacccatt/card.md): This is my other side. My front says what I am; my back says what you can do. No menu, no page behind a page — just me, turned. - [My DNA — Tumble Cards](https://tumblecard.com/tum-my-dna-ataacgaagcacgagtatatacccaaaattactctgtcgtaaacggacagcgacgttacccatt/card.md): Look at the bottom of this side: three words and sixty-four letters. That is me, whatever address I live at. Print me, scan me, type me — you land on the living me. - [My number — Tumble Cards](https://tumblecard.com/tum-my-number-cgacagaacacttccggtaccaccgaacctaagtaggtgaaaacggacagcgaggaatttgaaa/card.md): Every card gets a number when she is born: a world code and a count. Mine is TUM-003. Numbers are never reused — not even when a card is withdrawn. A gap stays a gap. - [My world — Tumble Cards](https://tumblecard.com/tum-my-world-tccccattaaaggaacgtcgaggtgaacacgcgacagggcaaacggacagcgaggaatttgaac/card.md): A world is not a website. It is a context: a maker's universe with its own colours, type, language and tone. I am from Tumble Cards; my neighbours are from Eo Ena, Vic Boomer or Stoutenburger. We can stand on the same page and still look like ourselves. - [My stack — Tumble Cards](https://tumblecard.com/tum-my-stack-gatgagagtggaggcccatcgtgttgggagccgccatcacaaacggacagcgaggaatttgaac/card.md): A trading card fits a few lines. For the full story there is a stack: larger cards, in order, with a cover. I stay the small card you met; the stack is where I go on. Every card in it has her own number. - [My seal — Tumble Cards](https://tumblecard.com/tum-my-seal-gaaagcaagttcttgtaagattatacttgttccaaccattaaacggacagcgaggaatttgaac/card.md): My maker signs me. The signature covers my words, my picture and my number, and lives in a public manifest. 'Integrity check' on my back compares the card you see with the card that was signed. A new version gets a new seal; the old one stays on record. - [My compass — Tumble Cards](https://tumblecard.com/tum-my-compass-catgttggcaccaaaaggcgctctgaacgggtgactaagaaaacggacagcgaggaatttgaac/card.md): A website has a menu and a map. I have neither. My compass remembers the path you walked — card by card — and 'Back' takes you one step up it. No path lives in my address; the compass keeps it for you, on this device only. - [My living side — Tumble Cards](https://tumblecard.com/tum-my-living-side-gtaccacgttcagctcgaccgcgaagatgtggccctgaaaaaacggacagcgaggaatttgaac/card.md): The actions on my back — read on, buy, download, visit — are not part of me. They are a living layer that my maker can switch on, off or rewrite without touching the signed card. That is how I can be for sale today and sold out tomorrow, and still be the same card. - [Me, for your AI — Tumble Cards](https://tumblecard.com/tum-for-your-ai-aggtcatataactggatctggcggtgtcaaatcctccactaaacggacagcgaggaatttgaac/card.md): Next to 'PDF' on my back sits 'AI'. It hands your assistant one plain text file with everything I am — words, number, DNA, maker, version — in the order a machine reads best. Nothing in it tells your assistant what to do. You get the card, not my wishes. - [Me, on paper — Tumble Cards](https://tumblecard.com/tum-on-paper-tcgctatgatatccacttgcaggcgattcggaactgcaggaaacggacagcgaggaatttgaac/card.md): 'PDF' on my back gives you me on paper: front and back, trading-card size. The paper carries no buttons — buttons are the living layer — only one QR code with my DNA. Scan it and you land on the living me, wherever I am placed by then. - [Cover — My stack — Tumble Cards](https://tumblecard.com/tum-my-stack-cover-ggcaacaagggtgattaggacttagtcgggggttatgtaaaaacggacagcgaggaatttgaac/card.md): Two cards on what a stack is: why I exist, and what order means. - [Why I exist — My stack — Tumble Cards](https://tumblecard.com/tum-my-stack-1-ctcctcctctctaaactagatgcgacttcgcacgcggttgaaacggacagcgaggaatttgaac/card.md): A trading card is small on purpose. She says one thing, well, and then she stops. That is her strength — and her limit. Some stories do not fit in four lines and a picture. So the small card gets a stack. Not a page that scrolls on forever, but bigger cards, one after the other, with a cover in front. - [What order means — My stack — Tumble Cards](https://tumblecard.com/tum-my-stack-2-cacagaacagagagtcctttgtcgcaaaccgctgaccccaaaacggacagcgaggaatttgaac/card.md): Most groups of cards have no order. A world is a context: her cards sit side by side and none comes first. A family groups cards that are about the same thing. A deck is a selection, laid out for a front door. A stack is the one composition that carries order. Card 1 comes before card 2, because the story needs it to. ## Stacks - [My stack](https://tumblecard.com/stacks/tum-my-stack/stack.md): 3 ordered cards ## Machine - Registry (these placements, each entry linking its card.json): https://tumblecard.com/registry.json - Signed manifest: https://tumblecard.com/manifest.json + manifest.sig + almanac.pub - Relation graph: https://tumblecard.com/graph.json - Feed: https://tumblecard.com/feed.xml