Lists, graphs, wire frames, UI mockups, brainstorming, IP-addresses, guest WIFI login credentials, sketches of Rick and Morty ... Basically anything you would

Lists, graphs, wire frames, UI mockups, brainstorming, IP-addresses, guest WIFI login credentials, sketches of Rick and Morty ... Basically anything you would use a notebook with pen and paper for in order to extend your working memory, but you want to share with others. Definitely not (non-pseudo) code longer than three or four lines.