Hi there, I am looking for a good, clear, plain English book or internet guide that explains how computer and software have developed over time and how they actually work. For example, in a typical transaction processing system for customer orders, what is the hardware and how is the software structured into programs and data files? When looking at such a system, how can you tell what it is and how it works - ie Mainframe or Client Server and such like? For example, if you wanted to extract transaction data how would you find the data file?
So I am looking for something that is going to give me at least a starting point on these questions.
Many thanks!
What is a VPN?
VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia��).