can I please know how the indicator OS (Mixpanel) was recorded?

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Based on the knowledge sources provided, I can answer your question about how the Operating System (OS) indicator is recorded in Mixpanel.Mixpanel automatically collects the Operating System (OS) information as a default property for both events and user profiles when using their client-side SDKs. For events, the OS is recorded as the "$os" property. According to the Default Properties documentation, the "$os" property represents the "OS of the event sender" and is automatically collected by Mixpanel's JavaScript, Android, iOS, and Unity SDKs.For user profiles, the OS is also recorded as the "$os" property. The User Properties documentation states that "$os" represents the "Last OS of the event sender" and is collected by the same set of SDKs.It's important to note that for user profiles, these default properties are only updated when you send or update at least one property yourself (via $set or $set_once operations).If you're using server-side tracking, you would need to manually add the OS information to your events or user profiles, as mentioned in the Server-Side Best Practices guide.

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