The Watcher Who Kept the Sky Safe
The Watcher Who Kept the Sky Safe
When enemy planes could strike without warning, one woman's clever way of building thinking machines kept the kingdom's eyes open and its skies safe. Her method quietly changed the world of computing forever.
Once upon a time, in a land always watching the sky for danger, there was a young woman named Jula.
Once upon a time, in a land always watching the sky for danger, there was a young woman named Jula.
She worked in a great stone tower with many clever people.
She worked in a great stone tower with many clever people.
Their job was to build a thinking machine that could watch a hundred places in the sky at once.
Their job was to build a thinking machine that could watch a hundred places in the sky at once.
The machine was enormous.
The machine was enormous.
It filled whole rooms.
It filled whole rooms.
It had very little memory, like a person who can only hold ten thoughts at a time.
It had very little memory, like a person who can only hold ten thoughts at a time.
Jula's job was to teach it to remember only the most important things, and to forget the rest very quickly.
Jula's job was to teach it to remember only the most important things, and to forget the rest very quickly.
This was hard.
This was hard.
Other engineers wrote one long pile of instructions and hoped for the best.
Other engineers wrote one long pile of instructions and hoped for the best.
Jula thought differently.
Jula thought differently.
She broke the instructions into small separate pieces.
She broke the instructions into small separate pieces.
Each piece did one job.
Each piece did one job.
If one piece broke, the others kept working.
If one piece broke, the others kept working.
She gave each piece a clear name and a clear purpose.
She gave each piece a clear name and a clear purpose.
Her colleagues looked at her work and frowned.
Her colleagues looked at her work and frowned.
"Why do it this way?" they asked.
"Why do it this way?" they asked.
"It takes longer to write."
"It takes longer to write."
"But it is much easier to fix," said Jula.
"But it is much easier to fix," said Jula.
She was right.
She was right.
When the great machine made a mistake, Jula's team found the broken piece quickly.
When the great machine made a mistake, Jula's team found the broken piece quickly.
They replaced it.
They replaced it.
The machine kept running.
The machine kept running.
Other teams, with their tangled piles of instructions, had to start over from scratch.
Other teams, with their tangled piles of instructions, had to start over from scratch.
The sky-watching machine worked for many years.
The sky-watching machine worked for many years.
It was replaced by better machines later, but the ideas Jula invented lived on.
It was replaced by better machines later, but the ideas Jula invented lived on.
Engineers in air-traffic towers and banking halls used the same thinking, even when they did not know her name.
Engineers in air-traffic towers and banking halls used the same thinking, even when they did not know her name.
Moral: Build things in small, clear pieces, and your work will last long after you are gone.
Moral: Build things in small, clear pieces, and your work will last long after you are gone.