ELI5: Explain Like I'm 5

Finite automata

Okay kiddo so, a machine is called a finite automata. Just like your toy cars that can move in different directions, finite automata can also move in different states. But, unlike your car that can move randomly, it moves according to the instructions given to it.

Finite automata has input and output systems. Inputs are what the machine receives and it processes them to give output accordingly. Just like when you say "Hi" to someone, they reply with hello, this is a process of input and output.

Now, the machine can solve some problems with the help of input, and these problems are pre-defined by the inventor of the machine. Let's suppose, the machine has to find the vowel in a word, the inventor will program the machine in such a way that it can identify vowels and ignore consonants.

Now, this machine has a specific language, it is called Finite Automata Language (FAL). The only thing required to use this language is to understand the instructions of the machine and the language it understands, which can be different for every machine.

That's pretty much it, kiddo! Finite automata is like a toy car, but it moves according to specific instructions given to it and solves a specific problem related to input and output.