# Glossary

> The terms used in Hirro and in these docs, from zone and stage to parent and child, walk-by, passport, digital twin, gateway and MCP.

Last updated: 2026-11-06

These are the words Hirro uses in the app, the dashboard and these docs.

| Term | Meaning |
|---|---|
| Asset | Anything you track: a machine, attachment, container, tool or vehicle |
| Tag | A small Bluetooth Low Energy beacon fixed to an asset. It sends a short signal every few seconds |
| Listener | Anything that hears tags: a staff phone, a site gateway, a vehicle gateway or a live tracker |
| Sighting | One report that a listener heard a tag, with the time and signal strength |
| Zone | A named area of a site, such as Row B or the wash bay, where an asset is placed |
| Stage | Where an asset is in its turnaround: returned, washed, checked, ready to rent |
| Walk-by | Staff phones hearing tags as people walk past |
| Site gateway | A fixed listener at one spot, such as the gate, wash bay or workshop |
| Vehicle gateway | A listener in a truck or carrier that hears the tags riding along |
| Live tracker | A device with GPS and 4G that reports its position from anywhere |
| Parent and child | A vehicle or machine and the attachments that travel with it |
| Passport | The asset's record: zone, stage, history, photos, tag and ERP item |
| Digital twin | Everything Hirro keeps about one asset: its usage ledger, maintenance log and plan, wear flags and documents |
| Usage ledger | The timeline of an asset's zones, stages, trips and rentals |
| Radar | The finder in the phone app that guides you to a tag by signal strength |
| Dwell time | How long an asset stays in a zone or stage |
| Living inventory | An asset register that updates itself from sightings, without counts |
| BLE | Bluetooth Low Energy, the radio standard the tags use |
| iBeacon, Eddystone | Common BLE beacon formats. Tags in these formats work with Hirro |
| MCP | Model Context Protocol, the standard AI assistants use to connect to other software |