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System Software
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Provides GUI
Manages the resources of the computer system
Defines the Software Platform
Components of System Software
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Operating system - controls the use of hardware
resources, External and Internal
Utilities --supplement the system
Device Drivers - control peripheral devices
Operating System
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RTOS
Single User/Single tasking
Single User/Multi-tasking
Multi-User
Popular OS
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DOS
Windows 3.x (operating environments) 1990
3.0, 3.1, 3.11
Windows 95 (improved GUI, more efficient multitasking) 1995
Windows 98 (more internet integration, easier to add devices (Upgrade to
Windows 95) 1998
Windows ME 2000 (upgrade to WIndows98)
Windows XP 2001
Windows NT (designed for networks looks just like Windows) 1996
Windows 2000 (faster performance, networking version (Server family), start
menu displays only apps use most frequently), preview multimedia files in
Windows before opening) 2000
Windows Vista (Longhorn) Released to general public (2007)
Unix, Linux
Network OS (NOS) Windows NT Server, Windows 2000 Server, UNIX,
Linux, Solaris
Embedded (Palm OS, Windows CE)
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Editions
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Starter
Home Basic
Home Premium
Business
Enterprise
Ultimate
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(Need 1 GB to 2 GB of
memory)
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Price ranges from $130300(upgrades)
$260-500(full version)
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Aero Graphics
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Change saturation, color, and
level of transparency
Vista, A First Look…
A redesigned
Start Menu in
Windows
Vista lets
users start
typing the
name of the
application
they wish to
open.
Treeview
Searching Files
A First Look…
The Pictures and
Video folder in
Windows Vista
contains new
information
about a picture,
including the
type of camera
used and a userassigned rating.
Parental Control Options
Operating System
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A set of programs containing instructions
that coordinate all activities among
hardware resources
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Allows you to run applications software
Some applications run on multiple platforms
(cross-platform)
Kernel
Memory-resident
Terminology
Software Platform
Cross-Platform
Memory resident
Single User/Single Tasking
Multi Tasking
Multi User
Multi Processing
Fault Tolerant Systems
Features of an Operating System
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Memory Mgt (optimize RAM)
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Handling Print Jobs
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VM (Virtual Memory)
Swap File, Paging, Thrashing
Buffer, Spooling, Print Spooler
Configuring Devices
Monitoring System Performance
Security
Booting a Computer
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Power Supply
CPU chip resets itself and looks for the BIOS ROM (basic input
output system)
BIOS executes the POST(power on self test)
Results are compared to CMOS
BIOS looks for boot program that holds the OS
Boot program is executed and loads the kernel of the OS
OS takes control
OS loads registry (configuration information), device drivers are
loaded
Remainder of OS is loaded, icons appear , Start UP folder is
executed and display is set