Raspberry Pi OS (previously called Raspbian)

1.Raspberry Pi OS (32-bit) with desktop and recommended software
  -Image with desktop and recommended software based on Debian Buster
  ==> 32G Memory 

2.Raspberry Pi OS (32-bit) with desktop
  -Image with desktop based on Debian Buster
  ==> 8G Memory: VNC 미설치  

3.Raspberry Pi OS (32-bit) Lite
  -Minimal image based on Debian Buster

 

https://www.raspberrypi.org/downloads/raspberry-pi-os/