Computer Aided Software Engineering (CASE) | HSEB Notes of Computer Science Class 12

Chapter : One
Computer Aided Software Engineering (CASE)
Subject : Computer Science
Class : 12

CASE stands for Computer- Aided Software Engineering. Case is the technology for automating software development and maintenance. Project teams (members who develop information system) use special software applications for creating prototypes quickly, building diagrams, writing codes and managing development. These applications are called CASE tools. Thus CASE tools are the types of software that automates the development of information system.

System Development Concept | HSEB Notes of Computer Science Class 12

Chapter : One
System Development Concept
Subject : Computer Science
Class : 12

System: 

A system is a collection or arrangement of entries or things that work together to achieve one or more common goals. It can also be defined as, a set of components linked together according to a plan to achieve a specific objective. In a typical system one or more inputs are changed into a desired output. Systems may be made up of other smaller systems, which are called as Subsystems. Subsystems in turn are made up of other subsystems. For example: a Computer System is made up of number of subsystems, which are input subsystem, storage subsystem, processing subsystem and output subsystem.

System Development Life Cycle (SDLC) | HSEB Notes of Computer Science Class 12

Chapter : One
System(Software) Development Life Cycle (SDLC)
Subject : Computer Science
Class : 12

System Development is the creation of new system or modification of old system. System Development involves number of stages starting from System Study to System implementation and maintenance. SDLC is an organized way to build an Information System. SDLC, in fact, is a sequence of events carried out by Systems Analysts, System Designers and users to develop and implement an Information System.