| AclManager | Provides passthrough and simplified methods for ACL management |
| AssignmentManager | Core assignment manager |
| AuthorManager | Core author manager |
| BaseManager | Base manager class |
| ChannelManager | Core channel manager |
| ContainerManager | Core container manager |
| ContentManager | Core content manager |
| EntryManager | Core entry manager |
| ExportManager | Export manager handles linking and generation of exports |
| IssueManager | Core issue manager |
| LockManager | Lock manager handles creation and management of locking requests. |
| MentionManager | Mention manager handles parsing mentions from text, association with models and message generation. All mentionable models must have SRNs |
| MessageManager | Message manager handles templated message generation. |
| QueueManager | QueueManager manages all CEO queues, QueueManager is managed by the service container and can be found at ``` DI::getDefault()->get('queue_manager') ``` |
| RouteManager | Base manager class |
| SettingManager | Setting manager assists in setting and retrieving values. |
| SstsManager | Core ssts manager |
| TagManager | Core tag manager |
| UserManager | User manager provides a standard API to user model management |
| WorkflowManager | Core workflow manager |
| WorkflowsectionManager | Core workflow section manager |