A credit card allows cardholders to pay merchants for goods and services with the promise to repay the card issuer. The card issuer creates a revolving line of credit that the cardholder can use to make purchases or get cash advances. Credit cards differ from charge cards in that they allow ongoing balances subject to interest charges rather than requiring full repayment each month. Credit cards also differ in that a third party pays merchants and is reimbursed by the cardholder.

1. Basic of Credit Cards

2. Wikipedia-
A credit card is a payment card issued to users (cardholders) to enable the cardholder to pay a merchant
for goods and services, based on the cardholder's promise to the card issuer to pay them for the amounts
so paid plus other agreed charges.[1] The card issuer (usually a bank) creates a revolving account and
grants a line of credit to the cardholder, from which the cardholder can borrow money for payment to a
merchant or as a cash advance.
A credit card is different from a charge card, where it requires the balance to be repaid in full each
month.[2] In contrast, credit cards allow the consumers a continuing balance of debt, subject to interest
being charged. A credit card also differs from a cash card, which can be used like currency by the owner of
the card. A credit card differs from a charge card also in that a credit card typically involves a third-party
entity that pays the seller and is reimbursed by the buyer, whereas a charge card simply defers payment
by the buyer until a later date. - Wikipedia
What is a credit card

3. How unique credit card numbers are created
Network Starting Digit Total Digits ( up to)
Master 2 or 5 16
Maestro 2 or 5 19
Visa 4 19
Diners 3 14
Discover 6 16
Amex 3 15

4. How does the network work
Source : http://treasurytoday.com/2007/05/interchange-fees

5. How does the network work
Source :
https://rortybomb.wordpress.com/2009/
12/01/should-the-us-reform-interchange-
fees-on-credit-cards/

6. Credit Card Key Terms
1. Annual fee
2. Minimum payment Due
3. Annual percentage rate (APR)
4. Over-the-limit fee
5. Average daily balance
6. Payment due date
7. Balance transfer
8. Cash-advance fee
9. Previous balance
10. Credit limit
11. Purchases/new charges
12. Finance charge
13. Grace period
14. Variable interest
15. Late fee
16. ANR
17. Revolvers
18. Transactors
19. Utilization
20. Payment Rate
21. GCL
22. NCL
23. Day Past Due

7. Credit Cards PnL Drivers
Source : Mareketelligent

8. ADB Based Interest Computation
Microsoft Excel
Worksheet

9. Sample Benefits ( max benefits for Transactors)

10. Sample Benefits ( max benefits for Transactors)