Source Code:-
![http://www.allaboutcomputing.net/](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfiSPdZ2pb5ZUTDQmRw1mAsQhJHXIl3uBQywqSfxqg2Y3p2YFjI3Wu_54rGm6om_oLBUwke0cmGbwVlLkkC7d9D4rgLXq0BvcTwMcmnhj52CHw8zwp154L8CiT3A2y5NgRBXyAiozzYeQQ/s1600/images+%25282%2529.jpg)
Most computer applications are distributed in a form that includes executable files, but not their source code. If the source code were included, it would be useful to a user, programmer, or system administrator, who may wish to modify the program or understand how it works.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKmRfooyidHtMsH1Y9duTK6KNfOEwzVb8A696DBssg7ciNlLO8Ddy5kRqlf9c9kcwuUgvh3tPyKBTGts9rHfxsckvjOHMx1MiDCVNzFVAkMriQnzNoA5PvKdsTWdf6Wa9-MTCDA84kH1Aj/s1600/images+(1).jpg)
Aside from its machine-readable forms, source code also appears in books and other media; often in the form of small code snippets, but occasionally complete code bases; a well-known case is the source code of PGP.
Object Code:-
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgm6mHfLAglf9FYi74E0ndh7ZSTO0ZMX43PyWklWQAEsZgqrdo-S_4Y33bcTSbwYL__PjQBXtP2RWb5DBRJIU7YKNHVruICLiGnJ7b2YbzVd0zRIt3yvrOymOjpNE6_NWM_FzTcHmeeTL5Q/s1600/images+%25283%2529.jpg)
Object files can in turn be linked to form an executable file or library file. In order to be used, object code must either be placed in an executable file, a library file, or an object file.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDPgpS0qDtnQDPk7NQ2V9ufIIJO7n0qZGIjYdfxw3mt0z4Zz1CoI_TrKZfG-xqSvj0SR7ftCAlXHQPOYDJe_B1V8akq7vp5Di05tyoKt6go5PqMTp0iQgACDMVMIoO_Y3JO840iKxcaKAe/s1600/images+%25284%2529.jpg)
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