code/modules/modular_computers/file_system/programs/messenger/messenger_data.dm 
| /proc/add_messenger | Registers an NTMessenger instance to the list of pda_messengers. |
|---|---|
| /proc/remove_messenger | Unregisters an NTMessenger instance from the pda_messengers table. |
| /proc/get_messenger_name | Get the display name of a messenger instance |
| /datum/pda_chat | Chat log data type, stores information about the recipient, the messages themselves and other metadata. |
| /datum/pda_message | Chat message data type, stores data about messages themselves. |