| ERRORLOG | The errorlog subsystem provides a uniform mechanism for system units to record unexpected internal processing states or unexpected results returned from system libraries. |
| RPSERVER | Several network subservices regularly need to record data for subsequent processing. The record management subsystem provides a single implementation of the collection software. |
| MTDEMON | The mtdemon is the scheduling entity of the Message Transport System. It analyzes queued message transport requests placed in the queue by user-agent and gateway processes. |
| POSTMASTER | Handles local mail delivery and delivery notifications. |
| SHAREDATA | This subsystem manages teh customers shared folders, .image information, and EDI tables. Certain network nodes are designated as sharedata providers, with at least one per site. |
| PDU | Portable Distributed Unix provides a networked I/O capability to support the Shared folder feature. It is comprised of transmitters for requesting remote execution and receivers for processing requests from remote processes. |
| NCDEMON | Handles sharedata caching and runs as a subprocesses to PDU. |
| ECONOMASTER | Handles delivery of messages during off-peak hours. An economaster process on each system spawns off an economaster for each spool and customer filesystem as controlled by the times in em.table. |
| UUDEMON | Controls all unix account sessions on each processor. |
| NMDAEMON | Network monitor processes. Runs specific processes as directed by /etc/monittab to ensure health of several network components. |
| MIRRESTORE | Service controls the updating of mirrored disks on a processor. |
| AUTH | This process controls customer access to the network. This is accomplished by accepting a user's ID and password pair and comparing this information to the customer directory (CD). If there is a good match, the user will be offered the appropriate menu prompts or spliced directly into the mail service on their home filesystem. |
