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
1.3.6.1.4.1.8186.7.1.1	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)

-- DavidLeBlanc - 2019-10-07