Hollerith code

Hollerith code is a way of representing letters, numbers, and symbols using holes punched into a card. Imagine a little card that has holes punched in it that make different shapes, like circles or rectangles. These shapes can represent different letters, numbers, and symbols.

So let's say you want to write the word "cat" in Hollerith code. You would need to make three cards, one for each letter. On the first card, you would punch out the circle, rectangle, and circle shapes to represent the letter "c." On the second card, you would punch out the rectangle, circle, and rectangle shapes for the letter "a." And on the third card, you would punch out the circle, rectangle, and rectangle shapes for the letter "t."

Now, if someone wanted to read the code, they would place the cards in a machine that could read the holes and translate them back into letters, numbers, and symbols.

This method was used in early computing systems to input and store data. Although it may seem primitive compared to modern methods, it was a revolutionary technology at the time and helped pave the way for future advancements in computing.