CSI 400/500 Operating SystemsSpring 2009
Lecture #1 – Operating System FundamentalsWednesday January 21, 2008
OS Body
OS Forms
OS Shell
Command basedSimple InterfaceText output
Example: Unix sh
GUI
Graphical User InterfaceEvent drivenDisplay items cause events to occur
Example: MS Windows
DBMS
Database Management SystemsTranslates data commands into system functionsCan be text or graphical
Examples: SQL, PowerBuilder
Driver Library
Selection of different functional kernels Correct kernel chosen by system– Often given parameters to consider
Example: Linux
OS Strategies
Batch Systems
Sequence of commandsSelf-containedNo interactionStill used today
Example: IBM JCL
Timeshare Systems
Multi-user, “single” processorLimited accessLarge jobs run in background
Examples: IBM TSO, Plato
Workstations
Modern personal computerIndependent or networkedSeparate processor
Networks
Join workstations and data resourcesAccess controlNew concerns
Example: WWW
Embedded Systems
Control systemSelf-containedSelf-correctingReal time system
Examples: satellites, power stations, autos
PDAs
Personal digital assistantSmall handheld workstationFocused on communication
