A mobile phone (also called mobile, cellular phone, cell phone or handphone)[1] is an electronic device used for full duplex two-way radio telecommunications over a cellular network of base stations known as cell sites. Mobile phones differ from cordless telephones, which only offer telephone service within limited range through a single base station attached to a fixed land line, for example within a home or an office.

A cell phone is a example of mobile and ubiquitous computing. A cell phone is mobile because it is able to be moved from one place to another. A cell phone is also ubiquitous because two people are able to communicate from different places by calling one another as well as SMS and video messaging. Lastly, a cell phone is classified as a computing device because it accepts input, processes that input into data that the cell phone can read, and produces output as information that a human can read.

Mobile and Ubiquitous Computing can be broken down into three separate words that can come together to make one topic. First, mobile means able to be moved. There are many technological mobile devices. There are cell phones, Ipods, portable DVD players, PDAs, laptops, and many other devices that can be moved or transported from one place to another. Second, ubiquitous means being present everywhere at once. Having the ability to stream live from a camera or cell phone to a website over the Internet makes that particular video ubiquitous.

With the rapidly increasing penetration of laptop computers, which are primarily used by mobile users to access Internet services, support of Internet services in a mobile environment become an increasing need. The opportunities emerging from these technologies give rise to new paradigms such as mobile computing and ubiquitous networking

This page provides resources on "ubiquitous" or "pervasive" mobile, relating to developments in the miniaturization of mobile wireless devices and the proliferation of always-on, everywhere communications. This phenomenon has been referred to as '"pervasive communications", invisible mobile (Forrester), "ambient computing", "ubiquitous computing" (USA) or "ubiquitous networking" (Japan). Technological convergence underlying next-generation networks (NGN) is set to play a key role in realizing this wireless ubiquity. 

andheld devices have become ruggedized for use in mobile field management situations to record information in the field. They are used to achieve a variety of tasks for increasing efficiency that include digitizing notes, sending and receiving invoices, asset management, recording signatures, managing parts and scanning barcodes.