Our global entry into the registry of object identifiers (OIDs): http://www.oid-info.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.
1.3.6.1.4.1.8186.7.2 is for LDAP objectclasses.
1.3.6.1.4.1.8186.7.3 is for SNMP objects.

These are branched even further:

OID	Name of object	Purpose
1.3.6.1.4.1.8186.7.3.5	VirusSpamstats	in-house CS Mail filtering metric (no longer used)
1.3.6.1.4.1.8186.7.3.4	LDAPStats	in-house CS LDAP usage metric (no longer used)
1.3.6.1.4.1.8186.7.3.3	MailStats	track mail server (SMTP) usage (no longer used)
1.3.6.1.4.1.8186.7.3.2	LoginStats	track number of logged in users (no longer used)
1.3.6.1.4.1.8186.7.3.1	DHCPcheck	track DHCP stats of: active, available, abandoned, and total addresses (no longer used)
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.
1.3.6.1.4.1.8186.7.2.3	CSstudent	CS student specific data; Used to track CS student accounts
1.3.6.1.4.1.8186.7.2.2	CSsoftware	Software object; software inventory
1.3.6.1.4.1.8186.7.2.1	CSdevice	CS device class mixin with core device; hardware inventory
1.3.6.1.4.1.8186.7.1.9	CSsoftwaretype	Type of software; software inventory
1.3.6.1.4.1.8186.7.1.8	CSstowed	software stow status; software inventory
1.3.6.1.4.1.8186.7.1.7	CSclassof	Graduation year; tracking of student accounts
1.3.6.1.4.1.8186.7.1.6	CSsupportLevel	level of support from sysadmins; software inventory
1.3.6.1.4.1.8186.7.1.5	CSversion	version of software; software inventory
1.3.6.1.4.1.8186.7.1.4	CITserialnumber	CIT inventory serial number; hardware inventory
1.3.6.1.4.1.8186.7.1.3	CStype	Type of device; hardware inventory
1.3.6.1.4.1.8186.7.1.2	CSmanufacturer	Company who made device; hardware inventory
1.3.6.1.4.1.8186.7.1.12	alternateMail	Alternate Mail addresses NOT FOR DELIVERY
1.3.6.1.4.1.8186.7.1.11	CSservice	A Service the device provides
1.3.6.1.4.1.8186.7.1.10	CSstatus	Status; prof, grad, staff, etc.
1.3.6.1.4.1.8186.7.1.1	CSmodel	name or model number of device; hardware inventory

-- DavidLeBlanc - 2019-10-07