166
xkcd 2347
(programming.dev)
Transcript
[A tower of blocks is shown. The upper half consists of many tiny blocks balanced on top of one another to form smaller towers, labeled:]
All modern digital infrastructure
[The blocks rest on larger blocks lower down in the image, finally on a single large block. This is balanced on top of a set of blocks on the left, and on the right, a single tiny block placed on its side. This one is labeled:]
A project some random person in Nebraska has been thanklessly maintaining since 2003
I'd say it's NTP. Used in almost every computer on the planet. Only understood by a handful of people. Used to be maintained by literally just one person.