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					                                       PPT/2K804/04
                         Revision no.: PPT/2K403/02




Laptop & Palmtop Computers
                                                                                                                                                         Revision no.: PPT/2K804/04



Types and Classes of Portable Computers


• Three basic form factors describe most of the PC-compatible

  portable computer which are

   – Laptops

   – Notebooks

   – Subnotebooks

• Categories are based primarily on size and weight, but these

  factors have a natural relationship to the capabilities of the

  system.

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                                                                                                                                                         Revision no.: PPT/2K804/04



Laptops

• Improvements in the battery technology and the invention of
  the Large liquid crystal display led to the development of the
  Laptop in the 1980.
• Laptops had a folding LCD
  panel display and an external
  power supply.
• A laptop system weighs 7
  pounds or more and is
  approximately 9×12×2 inches
  in size.
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                                                                                                                                                         Revision no.: PPT/2K804/04



Laptops (contd.)


• Large active-matrix displays, with 64MB–256MB of RAM, and

  hard drives of up to 20GB or more in size with virtually all

  systems now carrying fast CD-ROM or DVD drives; onboard

  speakers; and connectivity options that enable the use of

  external display, storage, and sound systems

• Some models even include combo DVD-CD/RW drives and

  wireless Wi-Fi network capabilities.

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                                                                                                                                                         Revision no.: PPT/2K804/04



Notebook

• A notebook system is designed to be somewhat smaller than a
  laptop in nearly every way: size, weight, features, and price.
• Improvements in the IC technology led to the development of
  the notebook computer.
• It was 8.75 inches deep, 11 inches wide
  and 2.25 inches thick.
• Notebooks are targeted at a wider
  audience, from the power user
  who can’t quite afford top-of-the-line
  laptop to the bargain hunter who
  requires only basic services.

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                                                                                                                                                         Revision no.: PPT/2K804/04



Subnotebooks

• Subnotebooks are substantially smaller than both notebooks
  and laptops and are intended for users who must enter and
  work with data on the road, as well as connect to the office
  network.

• First component omitted in a
  subnotebook design is the internal
  floppy drive, CD-ROM drives and
  other bulky hardware components,
  although some include external units.

     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                         Revision no.: PPT/2K804/04



Desktop v/s laptop

• Laptops are "desktop replacements", that is they replace
  desktops and there is no need to purchase a desktop, if you
  have a laptop.
• Laptop has some fundamental differences from a desktop in
  terms of :
   – Expandability
       If you purchase a laptop, there is only so much you can change or
       upgrade at a later time.
   – Price
       A laptop is portable, but you pay for this portablity in upfront
       purchase price.

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                                                                                                                                                         Revision no.: PPT/2K804/04



Palmtop (Handheld Mini-Notebooks)


• Palmtop computers are typified by the Libretto series from

  Toshiba which weigh about a kilogram, feature a built-in hard

  disk, have screens of 8 inches or less in size, and offer a tiny

  keyboard with an integral TrackPoint device.

• Some of the newer Japan-market Librettos use the Transmeta

  Crusoe processor, which can emulate Pentium and similar x86

  CPUs.

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                                                                                                                                                         Revision no.: PPT/2K804/04



Personal Digital Assistants (PDA)


• Personal Digital Assistants (PDA's) are small portable

  handheld computers that organize data, such as your

  schedule, address book, appointment calendar

   and to-do list.

• PDA will include software that will manage

   tasks on your desktop PC and synchronize

  tasks with your PDA.
     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                         Revision no.: PPT/2K804/04



PDA (contd.)

• Factors to consider while selecting the PDA depending on the
  use are:
   – Size
           • Size of a PDA can range from that of a credit card to a notebook
                 computer.

           • Larger handheld PDA's range in size from a thick checkbook to a
                 small notebook computer which usually cost more than smaller ones.

   – Operating Systems
           • Two operating systems dominate the PDA market - Microsoft's
                 Windows CE and 3Com's Palm OS.


     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                         Revision no.: PPT/2K804/04



PDA (contd.)

           • Windows CE operating system comes with a large set of standard
                 applications and its interface uses a variation of the familiar Windows
                 desktop.
           • 3Com's Palm operating system tend to operate faster - starting up
                 faster after you turn them on, running applications and finding data
                 faster etc.

   – Display types
           • PDA's use displays which are small and the display usually covers
                 most of the front of the unit.
           • All PDAs have a liquid crystal display (LCD), backlit touch-screen with
                 a stylus for tapping commands, selecting items, and writing text and
                 has a resolution of 320 x 240 pixels with four shades of grey and
                 expensive colour models offer 256 colors.

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                                                                                                                                                         Revision no.: PPT/2K804/04



PDA (contd.)

   – Memory requirement

           • PDA's are usually supplied with 512-Kb of system RAM in credit card

                 models and up to 16 MB in larger models and many models also

                 provide expansion slots for more memory.

           • Operating system and built-in application programs are stored in ROM

                 and to enable you to upgrade, some manufacturers place the

                 operating system in a socketed ROM module which can be removed

                 from its socket and replaced with a new one whereas other

                 manufacturers use flash memory which can be erased and

                 reprogrammed but will not erase when the power is disconnected.

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                                                                                                                                                         Revision no.: PPT/2K804/04



PDA (contd.)

 Compatibility problems led to the development of the following PCMCIA cards
                                 and slot types.


   Type                          Standard Description
   Type I                        These slots work with memory expansion cards
                                 which are 3.3mm thick.
   Type II                       It supported most expansion devices such as
                                 communication hardware and network adapters.
                                 These cards are 5 mm thick.

   Type III                      It was 10.5 mm thick and was used for removable
                                 hard disk drives and compatible with Type I and II.

   Type IV                       It was used for hard disk drives with size thicker than
                                 10.5 mm thick.
     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                         Revision no.: PPT/2K804/04



PDA (contd.)

   – Data Transfer from PC to PDA

           • Most common method for transferring data to your desktop PDA/PC is

                 via a cable through a serial port however, many PDA's can

                 communicate with each other through an infrared port as well.

   – Inserting text into a PDA

           • Larger PDA's have actual keyboards but medium and small PDA's

                 require you to enter information through the touch screen with the

                 stylus but most systems let you tap letters on an on-screen

                 "keyboard" or write letters on an on-screen tablet.



     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                         Revision no.: PPT/2K804/04



PDA (contd.)

   – Power sources
           • Most PDAs come with either alkaline batteries (usually AA size) or a
             rechargeable battery pack and many also include a small backup
             battery to protect the memory when your main batteries run out.
           • Many PDAs have power-management settings to help the batteries
             last longer.
   – Accessing e-mail and Internet on a PDA
           • Many PDAs are designed with the assumption that you'll check e-mail
             through your desktop PC and download the messages to your PDA for
             future reading however, some PDAs include a built-in modem or a slot
             where you can add one, allowing you to send and receive e-mail
             directly.
           • Larger PDAs based on Windows CE may include Pocket Internet
             Explorer, a slimmer version of Microsoft Internet Explorer and tapping
             your stylus on a touch screen that's running Pocket Internet Explorer
             is a convenient and fun way to surf the Web

     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                    Revision no.: PPT/2K804/04




                                                    Design & Published by:
      CMS Institute, Design & Development Centre, CMS House, Plot No. 91, Street No.7,
                                          MIDC, Marol, Andheri (E), Mumbai –400093
                                                           www.cmsinstitute.co.in

© CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute

				
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