Ready. Set. Execute! Whenever you open a file on your PC you are executing a code that is programmed within an executable file. Types of executable files include Windows programs, Mac OS X applications, Android games and apps, scripts and macros.
Be careful! This type of files runs code when it is opened. If you ever see on in an e-mail attachment, for example, do not open it. Some familiar executable files extensions are .EXE, .APK, .COM, and .VB.