| No | Word | Definition |
| 1 | ACH | Automated Clearing House is an electronic network for financial transactions in the United States. ACH processes large volumes of credit and debit transactions in batches. ACH credit transfers include direct deposit payroll and vendor payments. |
| 2 | Digital Certificate | A digital certificate is an identification document. It functions like your passport or any other identity card. Among other information, the content of a digital certificate consists of the owner's information and the owner's public key. The content is signed digitally by a trusted party called the Certification Authority (CA). |
| 3 | Digital Signature | A digital signature is commonly used to ensure data integrity. It can be viewed as a combination of message digest and public key encryption. |
| 4 | EDI | Electronic Data Interchange is the structured transmission of data between organizations by electronic means. |
| 5 | EFT | Electronic Funds Transfer provides for electronic payments and collections. EFT is safe, secure, efficient, and less expensive than paper check payments and collections. |
| No | Word | Definition |
| 6 | ITU-T | International Telecommunication Union. ITU's Telecommunication Standardization Sector (ITU-T) produced over 160 new and revised standards (ITU-T Recommendations), covering everything from core network functionality and broadband to next-generation services. |
| 7 | Merchant | Merchant is a businessperson who trades in commodities that were produced by others, in order to earn a profit. |
| 8 | MIME | Multipurpose Internet Mail Extensions |
| 9 | MTA | Message Transfer Agent is software that transfers electronic mail messages from one computer to another, using client-server application architecture. |
| 10 | PGP | Pretty Good Privacy is a data encryption and decryption computer program that provides cryptographic privacy and authentication for data communication. |
| 11 | SEMS | Secure Electronic Messaging Systems |
| No | Word | Definition |
| 12 | SET | Secure Electronic Transaction protocol, for implementing credit card payment, an electronic check system for supporting check payment, and an electronic funds transfer system and an electronic cash system for emulating physical cash payment. |
| 13 | SMTP | Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks. http://tools.ietf.org/html/rfc5321 |
| 13 | SMTP-TLS | Service Extension for Secure SMTP over Transport Layer Security. http://tools.ietf.org/html/rfc3207 |
| 14 | VANs | A Value-added Network (VAN) is a hosted service offering that acts as an intermediary between business partners sharing standards based or proprietary data via shared Business Processes. |