Okay kiddo, I'll help you understand what machine-dependent software means.
You know how you have different toys, and some of them need batteries, while some don't? Well, just like that, different computer systems have different ways of doing things.
Machine-dependent software is a type of computer program that is designed to work with specific types of computer hardware. This means that it will only run on certain devices and won't work properly on others.
Think of it as a puzzle piece that only fits in a specific slot. The software only fits on a certain type of computer, and it won't work on any other.
For example, if you have a game on your tablet, it will only work on that tablet. If you try to install it on your phone, it won't work because it's designed for a different machine.
So, software developers need to create different versions of their programs to make sure they work on different computer systems. It's like making different versions of the same toy so that they work for different battery types.
I hope that makes sense, little one!