A keygen

What is a Keygen ?

Its a small program which is created to develop the registration key for a particular software.Every software have each Keygen.Its a short name for Key-generator.From the name itself it is quite understandable, isn't so ?

Keygen is created by a special algorithm which will follow the methods to get Keys which will be accepted by the software.The keygen creating programmer will understand the algorithm followed by the Software to be registered and he design that small program to succeed it.

These are some keygen's examples.

the programmer can design in his own likes.

Anti-Virus

Anti-Viruses are software created to protect computers from malware programs.Anti-Virus software will help us to eliminate the computer viruses, malware, Trojans, computer worms and other unwanted harmful programs and heal your files and folders from such harmful software.Now a days there is a lot of good Anti-Viruses are available in the market.So many are free, some others are shareware.Free trials of non-freeware Anti-Viruses are also available.

Some of the Anti-Viruses are listed below :

◘ Avira AntiVir

◘ AVG

◘ Bit Defender

◘ Karspersky

◘ Mcafee

◘ Norton

◘ F Secure

◘ Panda

◘ Avast

◘ Nod32

◘ Trend Micro

◘ G Data

◘ Zone Alarm

◘ Quick Heal

◘ Vipre

◘ Microsoft Security Essential 2011

Computer VIRUS

Virus is Vital Information Resource Under Siege.Virus is a programs that has been designed for user defined activities.Usually programmers create Virus in-order to access into others computer or websites.It also do spy work and other jobs according to its program design.Usually Viruses are created for money profit.In-order hack into banks computers, hackers may use Viruses and transfer money to their accounts.The first Virus was created by a kid namely Apple.Anti-Viruses are used to eliminate and heal data from such Viruses and unwanted programs.

           Virus can simply defined as programs that can be copy itself and infect computer.A true Virus can copy itself into another computer i.e spread from one to another computer (in some form of executable code) .The term 'Computer Virus'  is sometime used as a catch all phrase to include all types of malware even those have no reproductive ability.Malware includes computer virus, computer worms, Trojan horse, most rootkits, spyware, dish honest adware and other malicious and unwanted software, including true virus.

Application Softwares

Application Softwares

          Programs which are developed in order to serve a particular application are known as application softwares.for example Microsoft Office, Tally etc.

          Application Softwares can further be subdivided into three categories.  

         ☻ Packages

         ☻ Utilities

         ☻ Customized Softwares

(A) Packages :

       System softwares manage the computer hardwares in order to make a platform for the application programs to run.It is application softwares that make the computer useful for people.Application programs can be written to do every task.In this category general purpose application softwares are known as Packages.The following are the different category of packages ;

     i) Word Processors

    ii) Spread Sheets

   iii) Presentation & Graphics

   iv) Database Packages 

    v) DTP Packages

(B) Utilities :

      Utilities are those programs which are designed to assist computer for its smooth functioning.Some of the utilities are backup utility, Disc defragmentation, Scanning of viruses etc.

Utility Programs :

    

     i) Text editor 

     ii) Backup Utility

    iii) Compression Utility

    iv) Disc Defragmentation 

     v) Virus Scanner

(C) Customized Software :

       Customized Software means programs which are developed for meeting user requirement to serve a particular application.These type of softwares is called Tailor made software.For instance a hospital wants to customize its information system and gets a software according to its needs.This software cannot be copied into another hospital as it may not fit the requirements of the that particular hospital.

  

Language Processors

Language Processors

      Language Processors is a classification of System softwares.Usually programmers prefer to write programs in one of the High Level Languages (HLL) because of its simplicity.But computer understands only machine languages (Binary Language).So it is quite necessary to process programs written in HLL and translate it to language which understood by the computer.The system programs which perform this job are language processors .The different language processors are given below :

1) Assembler 

          This language processor converts programs written in assembly language into machine language

2) Interpreter 

          This language processor converts a HLL program into machine language by converting and executing it line by line.If there is any error in one line, it reports and execution of the program is terminated(stopped) at the sane time.We can resume the execution of the program only after rectification of the errors.For errors, debugging interpreters is very much useful. 

3) Compiler 

          A program called compiler translate program written in HLL into machine language.They also provide a list of source program statements and error message along with the line number.If there are no syntax errors in the program, computers generate objects files.Translating using compiler is called compilation.If no errors it automatically run the program it self.

Operating system softwares

Operating system softwares

             Operating system softwares is the most  fundamental system software.It is one of the System software.The Operating system of a computer is a set of programs that works as an interface between the user and the hardware devices.OS usually supplied by the computer manufactures control the overall operations of a computer.Operating system perform a variety of tasks.It manages resource of the computer.They also retrieve data from secondary storage, schedule the jobs for the processor to perform.In addition, they coordinate input and output operations.The OS not only makes the system convenient to use but also use hardware in an efficient manner.egs:-

♥ Windows 98

♥ Windows 2000

♥ Windows XP

♥ Windows 7

♥ GNU/Linux

System Softwares

System Softwares

      

      System softwares is a set of programs which are written to manage its resources and control its operations.

     System softwares are further classified into two :

1)  Operating System softwares

2)  Language Processors 

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