Personal digital assistants (PDAs) are general purpose computing devices that contain built-in applications like calendars, address books, to-do lists, games, and calculators. PDAs have evolved over three generations from organizers in the 1980s with basic functions, to smaller devices in the 1990s with better displays and connectivity to PCs, to touchscreen devices in the mid-1990s with customizable interfaces. PDAs run operating systems like Microsoft Windows CE, Palm OS, and Symbian OS and come in categories like organizers with keyboards or palm-sized devices without keyboards that use stylus input.

1. Personal Digital
Assistants
Submitted to Submitted by
Dr.V.Murugan M.Sahaya Pretha
Department of computer science M.Phil(CS)
and engineering
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3. What is PDA?
It is General Purpose Computing Device.
It contains set of built in Applications.
These are usually PIM Applications.
Personal Information Manager tool.
Such as
Calendar
Note pad
Address book
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4. To-Do List
Spread Sheets
Games
Calculator
Clock
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6. History of Generations
First Generation
In 1980’s PDA called Organizers.
It is only used for calculator, calendars, Phone Book.
It is not easy to access because
Inconvenient
Smaller
No Batteries
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7. Second Generation
In 1993’s Devices are Smaller, Better Displays, Text Input
technologies
User having to enter phone number, address, appointment via
tiny keyboard.
These are connected to PC.
It also solved the problem of losing the data.
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8. Third Generation
In 1995’s PDA are small, keyboard less and inbuilt programmable and
stylus touch sensitive screen.
The main feature is
User interface
Power saving mode.
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9. Device categories
Two categories are available
1. Organizers
2. Palm Sized Devices
3. PMR
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10. 1. Organizers
It has tiny Keyboard, large Display.
It similar to PC.
Example: Psion Series 3 and 5, Windows CE.
2. Palm- Sized Devices
 It has touch sensitive displays, no key boards and hand writing
recognition based text input method.
 Example: Palm, IBM Work Pad.
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11. 3. Another Type- PMR
 Portable multimedia reader and content player device.
 It designed to reading or listening to books in electronic
format.
 It allow mp3-encoding music.
 Example: Franklin eBook man.
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12. Operating Systems
PDA consist of
Hardware
Applications
Operating Systems
Three main contenders
Microsoft CE
Palm
Symbian with EPOC
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13. Windows CE
This OS used in Several Forms for mobile market
Packet PC’s- with out keyboard i.e., pen driven.
Handheld PC’s- clam shell sized with tiny Keyboard.
Handheld PC Professional- Smaller than laptop but larger than handheld PC.
Other non- mobile applications- Video game consoles and set top Digital TV
box.
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14. Palm OS
It is stylus Operated devices with touch screen and hand writing
developing method.
It working partnership with
Handspring
IBM
Qualcore
Symbol. It completely developed in the year of 2000. 24-11-2016 14

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16. EPOC- Electronic Piece Of Cheese
It came from epoch.
 In 1998, Nokia, Ericsson, Motorola, Psion teamed to form a company called Symbian.
 It originally developed by Psion.
 Then join some industry leaders. Such as,
 Sony, Sun, Philips, NTT, DoCoMo.
 It develop three designs
 Digital Handsets
 Hand Writing recognition
 Integrated Wireless Communication
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17. Other OS’s
Be OS
QNX Neutrino
Example of Embedded Linux
Agenda VR3- It connected to the internet.
It consist of set of PIM applications.
It completely Open Source.
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