Payments
Gateways and terminals confirming against the order they belong to, not into a spreadsheet beside it.
Third-party systems exchange approved records through defined interfaces, so operational tools connect without duplicating the source of truth.
In scope
What connectors cover
Four kinds of outside system, each joined through an interface rather than a copy.
Partners
Carriers, suppliers and marketplaces exchanging the records both sides agreed on, in the format they agreed on.
Devices
Scanners, scales, printers and terminals reading and writing through the same interface as everything else.
Third-party systems
Whatever already runs and is going to keep running, joined rather than replaced.
What defines the join
An interface is a promise about what will not change
Mobile and business applicationsWhich records cross, in which direction, how often, and what happens when the far end is down or answers slowly. Those four answers are the connector; the code is the easy part.
What changes
Three things that stop
Copying between systems
The record crosses once, through a defined interface.
Silent failure
A connector that cannot deliver says so, to someone.
Replacing what works
Systems that earn their keep get joined, not retired.