Java Virtual Machine
The Java Virtual Machine (JVM) allows a compiled Java program to run on any platform. That sounds pretty cool, right? You don’t have to worry about the fact that different platforms use different assemblers, because it runs on a virtual machine. But it’s pretty fast. Not as fast as a purely compiled language, but a lot faster than an interpreted language such as Python. Isn’t that a great idea?
But you know what would be even better? If everyone just used the same platform. (Preferably the one that I am currently using.)