**LET'S DEFINE THE PIECES**

Everything you need to know falls into one of three categories:

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===== 1. MODELS (LLMs) =====

These are the brains.
They are NOT software.
They are NOT programs.
They are NOT plugins.
They are neural networks stored in a single file, usually:

model.gguf model.safetensors model.bin

Examples of models:
LLaMA-3 8B
LLaMA-3 70B
Mistral 7B
Mixtral 8x7B
Qwen 2 7B
Phi-3

A model file contains:
Neurons
Synapses
Every learned pattern
All the intelligence

A model does NOT:
Have a UI
Open PDFs
Connect to NASA
Run indexing
Provide a chat window

It only takes text in → text out.

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