| network_userid | **{dotted-circle}** | string | Unique identifier for a user, based on a cookie from the collector (so set at a network level and shouldn’t be set by a tracker) |
| os_family | **{dotted-circle}** | string | Operating system family |
| os_manufacturer | **{dotted-circle}** | string | Manufacturers of operating system |
| os_name | **{dotted-circle}** | string | Name of operating system |