Skip to content
A haystack built around a pole, Russian Empire, 1909Sergei Prokudin-Gorskii · Library of Congress

No. 01

*stakkaz

Proto-Germanic, c. 500 BCE, reconstructed

haystack, rick

Our name is a word nobody wrote down. Linguists rebuilt it from the languages that inherited it. Its root, *steg-, meant a pole.

The Gokstad ship, built around 890, during its excavation in Norway, 1880Museum of Cultural History, University of Oslo · CC BY-SA 4.0

No. 02

stakkr

Old Norse, c. 800–1050

haystack, heap, pile

The Norse called it stakkr and carried it across the North Sea to England.

Two men threshing a bound sheaf, Luttrell Psalter, England, c. 1325–1335British Library, Add MS 42130, f. 74v

No. 03

stak

Middle English, c. 1300

a pile of grain or hay

English took it in as stak and made it a verb. To stack was to pile grain on purpose, one sheaf on another.

Chimney stacks over Winchester House, Southwark, from Long View of London, 1647Wenceslaus Hollar, etching (detail)

No. 04

chimney stack

Early Modern English, by the 1660s

chimneys standing together

The word left the farm. By the 1660s a stack could be chimneys standing together, or rifles leaned into a pyramid.

The Smithsonian stack in the Library of Congress, Washington, D.C., 1897Levin C. Handy · Library of Congress

No. 05

the stacks

Libraries, 1879

shelves of books

Libraries called their shelving the stacks: books kept one above another, so they could be found again.

Google’s first production server, 1999: cheap PCs running Linux, stacked tray on traySteve Jurvetson · CC BY 2.0

No. 06

tech stack

Software, 1998

layers that work together

In 1998 the German magazine c’t named Linux, Apache, MySQL and PHP the LAMP stack: layers, each relying on the one beneath.

A week of vitamins and medicines, sorted by dayStevepb · CC0

No. 07

supplement stack

Everyday English, by the 2000s

what you take, together

Nobody takes one supplement. What people take together came to be called a stack: several supplements, taken toward the same goals.

Supplement AI preview, published January 12, 2025

No. 08

Supplement AI

Our first name, January 12, 2025

a chatbot for supplement questions

Our first attempt at one question: what is most worth adding to my stack? A chatbot’s answer depended on what it happened to retrieve and how the question was asked.

Stakkaz on iPhone, 2026

No. 09

Stakkaz

Our name, Now

a pile built deliberately, piece by piece

So we went back to the word. The research, made comparable: what changed, for whom and in which outcomes. Your stack, calculated around you.

An exhibition in nine objects

From *stakkaz
to your stack

Stakkaz (STACK-ahz) is named after *stakkaz, the reconstructed Proto-Germanic word for a haystack, a pile built deliberately around a pole. Through Old Norse stakkr and Middle English stak, it became the English word stack. Stakkaz was formerly Supplement AI.

Forms marked with an asterisk are reconstructions: linguists infer them from the languages that inherited them, and their dates are approximate. Sources include the Online Etymology Dictionary and Wiktionary.