CIS 1000 Chapter 8: Chapter 8 CIS 1000

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Chapter 8 – CIS – Mobile Computing – Keeping Your Data on Hand
Subnotebooks – run fully featured operating systems but weight in at 2 pounds or less
Notebooks and Tablet PC’s – have larger screens and more power than subnotebooks
PMP = portable music player
Have a CPU, memory, input and output devices, requires own OS
No standard OS, each phone manufacturer makes its own
Symbian OS – popular OS for PDA / smart phones
OS is stored in ROM (non-volatile, permanent)
Other phone data, ring tones – stored on memory chip
Input devices – microphone and keypad, camera
Output devices – LCD screen, speakers
Analog-to digital converter chip – turns voice sounds into digital signals
Digital signal processor – handle the compression work of digital data
Base transceiver station – large communications tower with antennas, amplifiers, receivers and transmitters
(is what allows you to make a call)
Mobile Switching Center – is a central location
o “drops out” – dropped call when stations are too far apart
SMS – Short Message Service – aka text messaging
MMS – Multimedia message service – send messages that include text, sound, images, video
Wireless Internet Service Provider (Wireless ISP)
Micro-browser software – enhance internet browsing on a cell phone
Wireless Markup Language (WML) – text based, no graphics, hit on mobile screen
Small portable devices that enable you to carry your MP3 files around with you, also can store video, audio
and images
Not all PMP’s carry music – some like PS, standalone GPS, etc
Flash Memory – a type of nonvolatile memory, to store files – is what MP3 players use
Sampling rate – the number of times per second the music is measured and converted to a digital value
(bigger is better quality, and larger file size) - Kbps
Peer-to-peer sharing (P2P) Sharing – process of transferring files between computers
PDA –is a small device that allows you to carry and process digital information
Smart Phones – cell phones that have advanced memory and processing power
o Both contain a CPU, OS, storage ,input and output devices, ports
Stylus – pen like device you can enter data directly
Have LCD screens
Processer Speed – measured in hertz (Hz) – number of operations (cycles) the processer completes each
Two main OS -> Palm Os and Windows Mobile , ROM holds OS, RAM holds applications and data
Ultra mobile / subnotebook – larger screen and more processing power than phones
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