What is raspberry pi 3

Question

I want to know about it in detail and differ from cpu

Answer 1

It's like a programmer's mini hardware kit. The main part is a tiny motherboard with minimal connections.
You can do a lot of things with it, like:
1) Build a mini-desktop.
2)Build a robot
3) Build home automation stuff
4) Build a camera
and more!
The whole system is much smaller than a PC, and there's only 1 GB RAM.
Here's full CPU specs: 1.2GHz 64-bit quad-core ARMv8 CPU
You might find this helpful:
https://www.cnet.com/how-to/25-fun-things-to-do-with-a-raspberry-pi/
or Amazon has a lot of specs:
https://www.amazon.com/Raspberry-Pi-896-8660-Model-Motherboard/dp/B01CD5VC92/ref=sr_1_1?s=pc&ie=UTF8&qid=1485531894&sr=1-1&keywords=raspberry+pi