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CCP are an Icelandic video game developer, famous in particular for the giant single instance MMORPG Eve Online.

CSM is the Council of Stellar Management, it's an elected, CCP supported group of players who they consult with on how to improve the game.

For a moment there I thought the Chinese Communist Party had expirations on their NDAs!

Regarding the first: https://www.ccpgames.com/

Regarding the second: Council of Stellar Management. It's a player-elected lobbying group to steer and give feedback on (some) development decisions. You can read more about it here: https://community.eveonline.com/community/csm/

I thought I will be able to guess it after reading this wall of text. But I wasn't, is it a person, is it the company?

Seems like:

CCP Games (company)

The Council of Stellar Management (CSM) is a player-elected council created to represent the views of the players to CCP.