hardware software components
TRANSCRIPT
Hardware refers to the equipment in a
CBIS.
3 perspectives of organizational computing
are• Large system computing
• Stand alone personal computing
• Network computing
In large-system computing configurations,
terminals are attached to a central
computer. The central computer performs
most computations and controls attached
peripherals such as printers.
Personal computers are used for individual
work. Stand alone systems are not linked
to other personal computers or large
systems.
In network computing, multiple
workstations allow users to share data
and computing resources, both local and
remote. Personal computer networks may
also be linked to large systems.
End user input devices
Pen-based technologies
Imaging and digitizing devices
Voice input devices
Special purpose input devices• Source data automation
• Specialized keyboards
• Optical character recognition
• Magnetic ink character recognition
Central processing unit
Primary memory
Machine cycle –to process program
instruction
Sizing – bits, bytes, hertz, MIPS and
FLOPS
Parallel processing
Display devicesScreen resolutionText and graphicsMonochrome/ colorCRT/ flat panelPrinters• Print quality
• Solid font printers
• Dot matrix printers
• Ink jet printers
• Thermal transfer printers
• Laser printersSpecial purpose output devices• Plotters
• Voice output
• Film recorders
• Computer output microfilm
System Software
Application Software
Software Engineering & Tools
Trends regarding software
Management Concerns
Application software• Easy-to-use programs designed to perform
specific tasksSystem software• Programs that support the execution and
development of other programs• Two major types
Operating systemsTranslation systems (compilers & linkers)
Operating system and its components• Supervisor/kernal
• Command-language interpreter
• BIOSExisting operating system• MS-DOS
• Macintosh
• Windows
• UNIX
• LINUXInterleaving techniques in OS• Multiprogramming
• Multitasking
• Timesharing
• Foreground/ background processing
• Virtual memory
• Multi processing Language translators• Compilers , interpreters and assemblers
Utility program• Sorting, spooling and text editors
Operating
System
User in
terface
Device managementOperating
System
User in
terface
Device managementOperating
System
User in
terface
Device management
User
Interface
Basic Input and Output Services (BIOS)
• needed for a computer to boot up
User Interface
User Interface
Computer Hardware
Computer Software Relationships
Application Programs
Operating System
General purpose Application software• Word Processing
• Spreadsheets
• File Managers and database management systemsSpecial Purpose Application Software• Transaction Processing
• Analysis & Decision Making
• Planning, coordinating, Scheduling and organizing
• Retrieving and updating
• Reporting
• Writing
• Presentation
• Communication
• TrainingProgramming languages• From low level to 4GLs