Eve channel systems
Default primary systems, in order, cannot be removed:
Local (solar system chat, mostly used for presence awareness)
Corporation (npc and uncontrolled by default, player controlled if you joined a corp, main channel you will mostly use to interact, unless you plan on something else - see quaternary type)
Alliance (only if you’re in a player corporation that’s part of an alliance, it then cannot be removed, it will not appear if you are not in an alliance corp, used for inter-corp arrangements, chatting, planning, coordination etc)
Secondary and can be removed, not important:
-Constellation (no presence awareness unless someone talks in it)
-Region (same as above)
-whatever else, not important
Tertiary, can be removed, utility channels, MOTD available, dev created, free to join:
-help (several languages)
-trading (several channels for different things)
Quaternary, most important along with the primary channels, player created, password protected or not, with privilege setting abilities, invite only or free to join, MOTD and other settings available:
-intel-type channels for local players or inter-alliance / corp
-mixed operations channels
-secretive discussions channels
-personal use channels
-whatever strikes your mind
The type we need is the 4th one - the ability to create our own channels with MOTD, control designated to hand-picked players etc.
I used a specially created channel myself of the quaternary type to work together with 4 accounts / clients running at the same time on the same computer for fast links, coordination etc, and also with specialized MOTDs to help my trading and PI routes and schedules among all 12 characters. All were empowered to freely modify the boards for ease of access. It was total management freedom, an incredible boost to the quality of life in Eve.
So the quaternary type is my suggestion.