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There are varied types of electronic payment methods such as online credit card transactions, e-wallets, e-cash and wireless payment system. Credit cards constitute a popular method of online payment but can be expensive for the merchant to accept because of transaction fees primarily.

E-commerce (electronic commerce) is the activity of electronically buying or selling of products on online services or over the Internet.E-commerce draws on technologies such as mobile commerce, electronic funds transfer, supply chain management, Internet marketing, online transaction processing, electronic data interchange (EDI), inventory management systems, and automated data collection ...

There are three series of Raspberry Pi, and several generations of each have been released. Raspberry Pi SBCs feature a Broadcom system on a chip (SoC) with an integrated ARM-compatible central processing unit (CPU) and on-chip graphics processing unit (GPU), while Raspberry Pi Pico has a RP2040 system on chip with an integrated ARM-compatible central processing unit (CPU).

The best-known (credit) card associations are Visa, MasterCard, Discover, China UnionPay, American Express, Diners Club, Japan Credit Bureau and Indian Rupay . The acquiring bank enters into a contract with a merchant and offers it a merchant account. This arrangement provides the merchant with a line of credit.