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JVM stands for Java Virtual Machine. It's a virtual machine or runtime environment that allows Java programs to run on multiple devices and operating systems. The JVM interprets Java bytecode to run as a program, providing a runtime environment to execute this process. It's an integral part of the Java Runtime Environment (JRE).

The JVM is separate from its operating environment, supporting the "write once, run anywhere" philosophy. It enables a computer to run Java programs as well as programs written in other languages that are also compiled into Java bytecode.

The JVM translates bytecode into native machine code, which is a set of instructions that a computer's CPU executes directly.