Our global entry into the registry of object identifiers (*OIDs*):

https://oid-base.com/get/1.3.6.1.4.1.8186.7

From that page is a web-archived explanation of how the OID tree is constructed (included below).

Custom OIDs (Object Identifiers) are used to extend the schema for specialized purposes (for which no current standard schema exists).

Any entity may have an "arc", or a portion of the global hierarchy by registering with IANA.

The Computer Science Department at Caltech has 1.3.6.1.4.1.8186.7.

The ".8186." belongs to Caltech, and ".7." was granted from the ITS Department to CS.

Internally to CS, we have branched even further so that SNMP has a branch and LDAP has a separate branch:

*1.3.6.1.4.1.8186.7.1* is for LDAP attributes.%BR%

*1.3.6.1.4.1.8186.7.2* is for LDAP objectclasses.%BR%

*1.3.6.1.4.1.8186.7.3* is for SNMP objects.

These are branched even further:

| *OID* | *Name of Object* | *Purpose* |

| --- | --- | --- |

| 1.3.6.1.4.1.8186.7.1.1 | CSmodel | name or model number of device; hardware inventory |

| 1.3.6.1.4.1.8186.7.1.2 | CSmanufacturer | Company who made device; hardware inventory |

| 1.3.6.1.4.1.8186.7.1.3 | CStype | Type of device; hardware inventory |

| 1.3.6.1.4.1.8186.7.1.4 | CITserialnumber | CIT inventory serial number; hardware inventory |

| 1.3.6.1.4.1.8186.7.1.5 | CSversion | version of software; software inventory |

| 1.3.6.1.4.1.8186.7.1.6 | ~~CSsupportLevel~~ | level of support from sysadmins; software inventory |

| 1.3.6.1.4.1.8186.7.1.7 | CSclassof | Graduation year; tracking of student accounts |

| 1.3.6.1.4.1.8186.7.1.8 | ~~CSstowed~~ | software stow status; software inventory |

| 1.3.6.1.4.1.8186.7.1.9 | ~~CSsoftwaretype~~ | Type of software; software inventory |

| 1.3.6.1.4.1.8186.7.1.10 | CSstatus | Status; prof, grad, staff, etc. |

| 1.3.6.1.4.1.8186.7.1.11 | CSservice | A Service the device provides |

| 1.3.6.1.4.1.8186.7.1.12 | alternateMail | Alternate Mail addresses NOT FOR DELIVERY |

| 1.3.6.1.4.1.8186.7.2.1 | CSdevice | CS device class mixin with core device; hardware inventory |

| 1.3.6.1.4.1.8186.7.2.2 | CSsoftware | Software object; software inventory |

| 1.3.6.1.4.1.8186.7.2.3 | CSstudent | CS student specific data; Used to track CS student accounts |

| 1.3.6.1.4.1.8186.7.2.4 | CSperson | CS person status; Used to track CS accounts for inclusion to mail lists, etc. |

| 1.3.6.1.4.1.8186.7.3.1 | ~~DHCPcheck~~ | track DHCP stats of: active, available, abandoned, and total addresses _(no longer used)_ |

| 1.3.6.1.4.1.8186.7.3.2 | ~~LoginStats~~ | track number of logged in users _(no longer used)_ |

| 1.3.6.1.4.1.8186.7.3.3 | ~~MailStats~~ | track mail server (SMTP) usage _(no longer used)_ |

| 1.3.6.1.4.1.8186.7.3.4 | ~~LDAPStats~~ | in-house CS LDAP usage metric _(no longer used)_ |

| 1.3.6.1.4.1.8186.7.3.5 | ~~VirusSpamstats~~ | in-house CS Mail filtering metric _(no longer used)_ |