Stacker

Hey there! Do you know what a stack of pancakes looks like? It's when you have one pancake on top of another on top of another. That's kind of what a stacker is, but instead of pancakes, it's a bunch of computer programs and data.

See, when you use a computer program, the computer has to keep track of what it's doing so it doesn't get confused. It does this by creating a "stack" of information. Imagine you have a bunch of blocks, and each block has a number written on it. You start by putting the first block on the ground, and then you put a second block on top of it. But before you do, you write a number on the second block and say "OK, this block is number 2." Then you add a third block on top and write "This block is number 3" on it.

So now you have three blocks stacked on top of each other, and each one has a number on it. You can easily see that the third block is on top, then the second, then the first. This is what a stacker does with computer programs. It keeps track of what program is currently running, and what still needs to be done.

Let's say you're using a program that asks you to type in your name, and then it says "Hello, [your name]!" back to you. When you first open the program, it goes on the bottom of the software stack. But once you type in your name and hit "Enter," that task moves to the top of the stack. The program then brings up a new task, like asking for your age, and that goes on top of the name task.

So the stacker keeps track of all these tasks, and when one is done (like typing your name), it can be removed from the top of the stack so the computer knows what task to do next. And that's how a stacker works! It helps the computer keep everything in order so nothing gets mixed up.