O
Objective evidence – data supporting the existence or verity of something.
Online payment systems – a number of organisations offer third party payment services. The best known are: WorldPay, PayPal, Amazon.com Payments, Yahoo! PayDirect, and VeriSign Inc.
Open source – software whose code is open for anyone to look at and modify. Linux is a well-known type of open source software. See website at: www.opensource.org.
Operating system (OS) – the OS is the software that controls how a computer uses its memory, disk space, folders and files, desktop, etc. Microsoft Windows and Apple Macintosh are the two most popular proprietary operating systems. There are also open source operating systems.
Opt-in – an option in marketing campaigns that enables ...
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