ISO 8583:
It defines standard message formats and data elements for financial transactions conducted at point-of-sale terminals, ATMs, etc. Helps payment processors communicate securely and consistently.

Software tools:
Message format editor – Visually builds ISO 8583 message structures.
Testing platform – Simulates hardware devices to validate message processing.
API toolkit – Integrates payment systems with core banking/ERP software.

ISO 20022:
Next-gen standard defining XML-based messages for payments, securities, trade services. Enables interoperability across platforms.

Software tools:
Message definition repositories – Centrally manage ISO 20022 dictionary.
Schema compilers – Automatically generate files for different languages.
Reference data management – Validate incoming/outgoing messages.

PCI Standards:
Ensure payment security compliance for cardholder data storage & transmission.

Software tools:
Vulnerability scanners – Identify weaknesses for remediation.
Encryption libraries – Securely tokenize, mask, encrypt sensitive fields.
Key management systems – Rotate/distribute cryptographic keys securely.

EMV Standards:
Global protocols for chip-based credit/debit transactions at point-of-sale.
Terminal emulators – Test transaction flows on virtual POS devices.
Payment simulators – Simulate real-world payments for testing.
SDKs – Integrate EMV functionality into custom applications.

This equips payment processors to build robust, compliant next-gen transaction processing platforms.