# Embedded engineering glossary

 - **QNX (Quantum Network eXecutive)** - A proprietary real-time operating system (RTOS)
 - **Lock-free queue** - An efficient MT-safe queue implemented only using atomic instructions with no spinlocks, semaphores or mutexes. 
 - **FreeRTOS** - A type of 
 - **Linux PREEMPT_RT** - A way to turn Linux kernel into a real-time operating system (RTOS)