16-11-2012, 03:57 PM
Categories of Computer Software
Categories of Computer.ppt (Size: 660.5 KB / Downloads: 27)
Application software types
Custom development – programming
Expensive –
Consultant dependent
Hard to get out of
Within application development
Written within an existing software environment
Examples: Spreadsheets, Database applications
Turn key systems
Little customization – dependent on the vendor
“Turn it on and run it”
Categories of software: Layering
The hardware is the center
The system software – operating system
Controls the hardware and supports the application
Supports GUI (graphics user interfaces)
Controls communications
Development software – tools for creating applications
Programming languages
Database management software
Applications software – The big area
Common General- Purpose Applications
A move toward generic applications that can be adapted … spreadsheet software and database software.
Electronic Mail
Word Processing
Presentation Graphics
Multimedia
Personal Information Manager
Groupware
Summary
Software is more capable
Software is more graphic oriented - GUI
Software takes more computer resources
Disk storage and RAM
Databases are more and more dominant
Fewer standard computer languages
Software is more object oriented
Web based applications are increasing
Database systems
Chapter Summary
Computer software consists of two major types of programs: application software that directs the performance of a particular end user task, and system software that controls and supports the operations of a computer system.
Application software includes a variety of programs that can be segregated into general-purpose and application-specific categories.
System software can be subdivided into system management programs and system development programs. The former is used to manage hardware, software, networks, and data resources. The latter is used by IS specialists to develop computer programs.
An operating system is an integrated system of programs that supervises the operations of the CPU.