So, you know when you draw a picture on a piece of paper? It's like that, but on a computer. Only instead of just looking at the picture, the computer needs to know exactly what each part of the picture means.
That's where IGES comes in. IGES stands for Initial Graphics Exchange Specification. It's like a special language that computers can use to understand and share 3D graphics (that's a picture that looks like it's actually 3D and has depth, like a toy or a building).
Think of it like this - if you drew a picture of a toy car, IGES would be like the instructions that tell someone else exactly how you made that car. They could look at the instructions and make their own car that looks just like yours, even if they didn't see your original picture.
Now, why is that important? Well, imagine you're an engineer designing a new car. You might create a 3D model of the car on your computer, but you need to share that model with other engineers and people who will actually make the car. If they don't have IGES, they might not be able to see all the little details or understand how everything fits together. But if they do have IGES, they can look at your model and know exactly how to make the car.
So IGES is like a special language that helps computers and people understand 3D models, which is really important when you need to share a design or make something complex like a car.