Introduction

Abstract

Most people are familiar with general purpose computing devices, such as desktops and laptops. Their use is common-place and supports a wide variety of applications, many of which involve a wider access to distributed applications over the Internet (electronic mail, social media etc.). Users interact with general purpose computers directly through keyboards, mice and monitor screens. There are many consumer devices, such as mobile phones, tablet computers and satellite navigation devices, that are classified as embedded devices. They support user interaction through touch screens, microphones, audio speakers and accelerometers.