Handheld computers

mashpeemoveMobile - Wireless

Nov 24, 2013 (3 years and 8 months ago)

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Handheld computers

Presentation by:

Gerasim Trifonov


NBU


Handheld computers


A
mobile device

(also known as
cellphone
device
,
handheld device
,
handheld
computer

or simply
handheld
) is a pocket
-
sized computing device, typically having a
display screen with
touch

input or a miniature
keyboard. In the case of the
personal digital
assistant

(PDA) the input and output are
combined into a touch
-
screen
interface
.

Handheld computers



Mobile devices have been designed for many applications and
include:



Mobile computers



Mobile internet device



Personal digital assistant/enterprise digital assistant



Calculator



Handheld game console



Portable media player



Digital still camera (DSC)



Digital video camera (DVC or digital camcorder)



Mobile phone



Pager



Personal navigation device (PND)

Handheld computers

The First Laptop Computer
-

Osborne 1

• Dual 5ј
-
inch, single
-
sided 40 track floppy disk drives ("dual
density" upgrade available)

• 4 MHz Z80 CPU

• 64 kilobytes main memory

• Fold
-
down 69 key detachable keyboard doubling as the computer
case's lid

• 5
-
inch, 52 character Ч 24 line monochrome CRT display, mapped
as a window on 128 Ч 32

character display memory

• IEEE
-
488 port configurable as a Parallel printer port

• RS
-
232 compatible 1200 or 300 baud Serial port for use with
external modems or serial

Printers

Price
-

$1795

Handheld computers

Handheld computers

Netbook

Netbooks (sometimes also called mini
notebooks or ultraportables) are a branch of
subnotebooks, a

rapidly evolving category of
small, lightweight, and inexpensive laptop
computers suited for

general computing and
accessing Web
-
based applications; they are
often marketed as "companion

devices", i.e.,
to augment a user's other computer

access

Handheld computers

Handheld computers


Activities
:

Netbooks are highly adaptable to students ranging from kindergarten through high
school. Netbook

activities include, but are not limited to:

• updating class blogs with news or announcements

• posting relevant class information on wikis

• web 2.0 activities

• research/data analysis

• online debates/class conversations

• educational games/brain training exercises

• creating or listening to educational podcasts

• word processing

• creation of presentations

• access online textbooks and assessments

• updating personal calendars and schedules

• collaboration via cloud computing

Handheld computers

Personal digital assistant

(PDA)



A personal digital assistant (PDA), also known as a palmtop
computer, is a mobile device which functions as a personal
information manager and has the ability to connect to the
internet. The PDA has an electronic visual display enabling it to
include a web browser, but some newer models also


have audio capabilities, enabling them to be used as mobile
phones or portable media players. Many PDAs can access the
internet, intranets or extranets via Wi
-
Fi, or Wireless Wide Area
Networks


(WWANs). Many PDAs employ touch screen technology.


Handheld computers

Handheld computers

USES:


Automobile navigation


Medical and scientific uses


Educational uses


PDA for people with disabilities

Handheld computers

Mobile phones


In 1956, the first fully automatic mobile phone system,
called
MTA

(Mobile Telephone system A), was
developed by
Ericsson

and commercially released in
Sweden. This was the first system that did not
require any kind of manual control in base stations,
but had the disadvantage of a phone weight of 40

kg
(90

lb).
MTB
, an upgraded version with transistors,
weighing 9

kg (20

lb), was introduced in 1965 and
used
DTMF

signaling. It had 150 customers in the
beginning and 600 when it shut down in 1983.

Handheld computers

Handheld computers


Motorola's DynaTAC 'Dynamic Adaptive Total Area
Coverage' let you talk for 30 minutes, could go a full
eight hours between charges, was 13 x 1.75 x 3.5
inches in dimension, boasted eight hours of standby
time, took 10 hours to recharge, featured an LED
display and memory to store thirty "dialing locations".
Wooo.


Oh yes, the price was some $3,995 in 1983 dollars.


Consumers were so impressed by the concept of
being always accessible with a portable phone that
waiting lists for the DynaTAC 8000X were in the
thousands, despite the initial $ 3,995 retail price.


Handheld computers

Smartphones


A

smartphone

is

a

mobile

phone

that

offers

more

advanced

computing

ability

and

connectivity

than

a

basic

'feature

phone'
.

While

some

feature

phones

are

able

to

run

simple

applications

based

on

generic

platforms

such

as

Java

ME

or

BREW,

a

smartphone

allows

the

user

to

install

and

run

much

more

advanced

applications

based

on

a

specific

platform
.

Smartphones

run

complete

operating

system

software

providing

a

platform

for

application

developers
.

Handheld computers

The first smartphone was called Simon; it was designed by IBM in 1992
and shown as a concept

product that year at COMDEX, the computer industry trade show held in
Las Vegas, Nevada. It was

released to the public in 1993 and sold by BellSouth. Besides being a
mobile phone, it also

contained a calendar, address book, world clock, calculator, note pad, e
-
mail, send and receive fax,

and games. It had no physical buttons to dial with. Instead customers
used a touch
-
screen to select

phone numbers with a finger or create facsimiles and memos with an
optional stylus. Text was

entered with a unique on
-
screen "predictive" keyboard. By today's
standards, the Simon would be a

fairly low
-
end product; however, its feature set at the time was incredibly
advanced.

Handheld computers

Operating systems that can be found on smartphones include


• Symbian (including S60 series),


• iPhone OS


• Palm WebOS


• BlackBerry OS


• Samsung bada phones running Linux


• Binary Runtime Environment for Wireless


• Windows Mobile


• Android


• Maemo


WebOS, Android and Maemo are built on top of Linux, and the
iPhone OS is derived from the BSD

and NeXTSTEP operating systems, which all are related to Unix.

Handheld computers


IPod Touch

Hardware:


The iPod Touch has a slim rectangular shape with
rounded edges, with a glass touchscreen display
covering most of the top surface and a physical home
button off the touchscreen. The display functions
similarly to the multi
-
touch trackpad as implemented
in Apple's current line of laptop computers. The touch
and gesture features of the iPod Touch are based on
technology originally developed by FingerWorks. On
February 5, 2008, a 32 GB version was added in
addition to the 8 and 16 GB versions.


Handheld computers


Software

The home screen has a list of icons for the
available applications. All iPod Touch models
include

such applications as Music, Videos,
and Photos

(collectively duplicating the
standard functions of

the iPod Classic),
iTunes (providing access to the iTunes Music
Store), Safari, YouTube, Calendar,

Contacts,
Clock, Calculator, and Settings. Later models
added Mail (accessing POP/IMAP/SMTP
email),

Maps, Stocks, Notes

Handheld computers

The advantages of using a smartphone include:


live (online) access to data


reduces the number of devices a
person

needs to carry


much better web browsing capability than a cellphone


integration of contact / phonebook databases

The disadvantages of using a smartphone include:


requires an expensive wireless data plan


a single device means a single point of failure


policies restricting cellphone use at many hospitals


bigger and heavier than a regular digital cellphone


hard to use your PDA at the same time as talking on the phone