IT-Common executable file extensions

.scexe

Self-extracting firmware updates that Hewlett-Packard (HP) produces, commonly associated with Linux machine.

.bat

Batch file. Use to execute multiple commands from the windows command prompt( cmd .exe) within one file.

.app

Excites a program within OS X (as .exe does in Windows.

.msi

For installation and removal of software within windows. Opening an .msi file actually launches msiexec .exe which read the .msi file and does what it says. .msi files use windows installer, so think of it as standing for "Microsoft installation".

.exe

short for "Executable", it tells the OS to run the program. Most windows desktop programs use this extension.