After completion of all programs integration and 
testing,the seperate team is concentrating on System 
testing on that Build or AUT.
System Testing is divided into 3 categories.
1) Usability Testing
2)Functional Testing
3)Non-Functional Testing

This is done by Testers. During this testing process 
testers will verify the correctness of the system by using 
following system techniques.


1.GUI or Usability testing
2.Functionality testing
3. Performance testing
4. Security or penetration testing.

the testing conducted on the compleate intigrated system to
evaluate the system complaints with its specified
requirement called as system testing.

during this only test engineers are involving
they verifies the actual beheaviour of the application
it ic conducted wrt to srs documents.

it is divided in to 
<a>usability testing
<b>functionalitytesting
<c>non-functionality testing
<d>performance testing
<e>security testing.

After the application is developed and tested ,it needs to 
be deployed in client requirements environment(Operating 
Sys,web browser etc) and needs to be tested.This level of 
testing is known as System Testing and done by test 
engineers.

System Testing is NOT
1)Usability Testing
2)Functional Testing
3)Non-Functional Testing

It is defined to be Stress and Performance testing by 
variosu authors on QA. It is esentially testing of system 
architecture to check if the system can take perform given 
a certain load and if can give required output in time.

System testing is not testing system so test everything 
related to the the system like its gui, functionality etc. 
There are many application having no gui and a single 
functionality.

Plz dont confuse new comers here like me..

Answer only If you are sure about the answer..dont make any
hunches on the answers please.
This is not a survey on how many ppl have the answers.
so reply only if you r sure about the answers plz.

"System Testing is also known as INSTALLATION TESTING.This
is the most important part for Software testers.Programmers
check the Integration of modules and pack them,while Testers
will evaluate the package and make sure each and every
functionality is working and installed properly on the
customer platform and making sure the application dosnt
crash or leave the Customer system damaged.So testing the
INSTALLER.
Test the installer appropriately with combination of both
manual and automated processes on different machines with
different configuration.

# GUI software testing
# Usability testing
# Performance testing
# Compatibility testing
# Error handling testing
# Load testing
# Volume testing
# Stress testing
# User help testing
# Security testing
# Scalability testing
# Capacity testing
# Sanity testing
# Smoke testing
# Exploratory testing
# Ad hoc testing
# Regression testing
# Reliability testing
# Recovery testing
# Installation testing
# Idempotency testing
# Maintenance testing
# Accessibility testing,

are considered as part of System Testing.
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