When Computers Were People

The story

Here is a riddle from the past. Long before the machines in our pockets, offices had computers... that drank tea, wore cardigans, and went home for dinner.

Because a computer used to be a PERSON. That was the name of a job! A computer was someone who computed — who worked through long, hard sums with pencil, paper, and brainpower. Rooms full of human computers, many of them women, did the mathematics behind big projects — and some of the very best worked on the hardest sums of all: the ones for flying.

One of them was named Katherine Johnson. She worked in America, at the flight-research agency that would later become part of NASA — first on aeroplane mathematics, and then on the sums for spaceflight itself. Katherine had loved counting since she was tiny — she counted steps, counted dishes, counted everything — and she grew up so quick at mathematics that she skipped ahead in school. In those days she was often not given a fair chance, because of the colour of her skin. She was brilliant anyway, and asked her way into rooms where nobody had thought to include her.

Now — why does a rocket need mathematics? Think about throwing a ball to a running friend. You must aim ahead of them, at where they WILL be. A space capsule is like that ball, and the safe landing spot is the running friend — except everything is moving terribly fast, and there is no second try. Aim wrong, and the capsule misses its splash-down spot in the sea. The aiming is all done with sums. Get the sums right, and the astronaut comes home.

Katherine got the sums right. She worked on the path for America's first astronaut in space, and her numbers held true.

Then came the bigger flight: an astronaut named John Glenn would circle the whole Earth. And by now, the brand-new electronic computers — the machines — had arrived, filling whole rooms with blinking lights. The machines worked out Glenn's path. Fast. Impressive. But new, and to the astronaut... hard to trust completely.

So, close to launch, John Glenn asked for something that made history. Get Katherine Johnson, he said, and have HER check the machine's numbers by hand. If she says they are good... then I am ready to go.

Think about that. A famous astronaut, about to ride a rocket, trusted one careful person's pencil more than a room full of blinking machines. Katherine worked through the long chains of numbers — and they were good. Glenn flew, circled the Earth, and came safely home.

Katherine kept computing for the space programme for years, and when she was very old, her country gave her one of its highest honours, and put her name on a NASA building.

So remember what a computer really is: a person's careful thinking, sometimes wearing a machine's body. And remember what Katherine's pencil says: work so carefully, so honestly, that when something truly matters, people say — check it with YOU.