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Founded in 1998, PayPal, an eBay Company, is akin to an online (Internet) banking service. It enables any individual or business with an e-mail address to securely and quickly send and receive payments online. PayPal's service builds on the existing financial infrastructure of bank accounts and credit cards and uses the world's most advanced proprietary fraud prevention systems to create a safe, global, real-time payment solution. Located in San Jose, Calif., PayPal was acquired by eBay Inc. in October, 2002.

The Problem with Statistics

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29 Free Android Apps for Cash-Strapped Students

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Sharing Threat Intelligence

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The 7 Layers of the OSI Model

The Open System Interconnection (OSI) model defines a networking framework to implement protocols in seven layers. Use this handy guide to compare... Read More »

Network Fundamentals Study Guide

Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »

Computer Architecture Study Guide

This Webopedia  study guide describes the different parts of a computer system and their relations. Read More »