Glossary

Term	Meaning	Notes
Project	A queueable scenic-area service/attraction with its own code, configuration, status, and sessions	Public display URLs normally use the project code
Queue session	A project's operational queue for one business date	Owns next number and revision
Queue ticket	One numbered party waiting for or receiving service	Party size is immutable after creation
Call batch	One staff call action containing a contiguous set of tickets	Android announces first-to-last for a multi-ticket batch
Overview display	Multi-project public display corresponding to `/admin/display`	Read-only and never announces
Project display	One project's public display at `/display/{identifier}`	The only Android state allowed to announce
Snapshot	Authoritative privacy-safe project display response	Drives both Android UI and announcement detection
Display identifier	Project code or compatible public display token accepted by the snapshot endpoint	Overview navigation requires a non-empty project code
Revision	Monotonic queue-session change marker	Supports event/poll recovery and freshness
Experienced people	Displayed as the greater of the configured starting value and cumulative issued party size in the current project-local business-day session	Distinct from issued ticket count
Announcement baseline	First snapshot accepted after entering/resuming a project screen	Stored silently to prevent replaying an old call