For the Operational and Analytical Reporting API, what is the difference between the synchronous and asynchronous calls?

Here are the definitions for synchronous versus asynchronous calls:

• Synchronous – the client application posts a request and waits for the response.
• Asynchronous – the client application posts a job request to a queue and periodically polls the status of the job. Upon completion, the client application downloads the results one batch file at a time. This is capable to retrieve a bigger amount of data.

Operational Reporting API for Strategic Sourcing

Operational Reporting API for Procurement

Analytical Reporting API for Strategic Procurement and Operational Procurement

Catalog Management > Catalog - REST API
Core Procurement > Procurement REST APIs
Procurement Application Services > API Portal & Platform > API Developer Portal
Purchasing
Purchasing > Services Procurement
Spend Visibility
Spot Buy
Strategic Contracts
Strategic Contracts > Strategic Contracts - REST API
Strategic Sourcing
Strategic Sourcing > Strategic Sourcing - REST API
Supplier Lifecycle & Performance > Supplier Lifecycle & Performance - Open API