This document defines and describes several common computing and mobile devices: Personal digital assistants, mobile phones, laptops, desktop computer base units, tablets, game consoles, and servers. It provides brief explanations of the basic functions and components of each type of device. Modern devices often have abilities to connect to wireless networks and the internet, run applications, and store or access data remotely. The document serves to introduce and compare the main categories of personal, mobile, and networked computing systems.

1. Non-technical
By George Lee

2. PDA
• A personal digital assistant, or
personal data assistant is a small
mobile device. It is a mobile
device that functions as a
personal information manager.
Modern PDAs have the ability to
connect to the internet via
wifi, enabling it to include a web
browser. But some newer
models also allow the user to
use it as a mobile phone or
media players.

3. Mobile Phone
• A mobile phone is a device that
can make and receive telephone
calls over a radio link. A mobile
phone can be used while on the
go, and are very portable. Modern
mobile devices also include
services like text
messaging, MMS, Bluetooth, Infrar
ed. Some phones offer more
computing capabilities are referred
to as smart phones.

4. Laptop
• A laptop is a personal computer for
mobile use. In the Laptop, there are
the typical components of a desktop
computer, including a built in
keyboard, a mouse (Touchpad), and a
display and sometimes integrated
speakers. A laptop is powered by
mains electricity through an AC
adapter, this charges the battery so it
can then be used away from a power
outlet.

5. Computer Base Unit
• The Base Unit is the main part
of the PC, it lies flat or stands
like a tower. It is the heart of
the PC as it holds all the vital
parts of the computer, like the
processor, hard drive and
optical drive, Etc. the base
unit can be opened if you
wish to upgrade or change
components.

6. Tablet
• A tablet computer is a mobile
computer that is larger than a
PDA or mobile phone. They
are normally controlled by a
touch screen. Many tablets
have the ability to connect to
the internet via wifi or a usb
port, server.

7. Game Console
• A video game console is an interactive
entertainment computer. There are many
different types of game consoles
(Xbox, PlayStation, Nintendo Wii). The
Xbox like most consoles, is controlled by a
wireless controller and can be played
online. The memory of the console can be
upgraded by purchasing new hard drives
or external memory devices. The optical
drive in an Xbox is capable of reading Xbox
games, dvds and cds, some other consoles
are capable of reading Blu-Ray discs as
well.

8. server
• The server is a computer program
that is run to serve requests of
other programs(the clients). The
server performs a task on behalf
of the clients. The clients will run
on either the same computer or
connect through the network.
Services provide essential
services across a network to
public users via the internet or to
private users inside a large
organization.