A type of binary file containing [[Machine Code]] instructions for a program. ## Types of Executable Files | **Os** | **Executable Type** | | ------- | -------------------------------------------------------------------------------------------------------------------------------- | | Windows | [exe](https://en.wikipedia.org/wiki/.exe) | | Linux | [elf64, elf32](https://0xax.gitbooks.io/linux-insides/content/Theory/linux-theory-2.html), x86_64, etc based on CPU architecture | | Mac | [Mach-O](https://en.wikipedia.org/wiki/Mach-O) |