Difference Between QNX and VxWorks Operating System

QNX stands for QNX is Not Unix. QNX is a Unix-like Real Time Operating System, which is dedicated primarily to the field of embedded systems. QNX was launched in 1982. Blackberry Limited owns it. QNX is built on the Mach microkernel and runs on a variety of processors including ARM, MIPS, Power PC, and x86 architectures. In 2015, over 6 million devices were running on the QNX OS. The most widely used products are BlackBerry smartphones. To develop embedded applications QNX supports C, C++, and Ada, and provides multiple development tools and libraries.

VxWorks is a versatile real-time operating system providing low-cost, high-performance industrial and system-on-a-chip (SoC) applications. It was launched in 1987. It is mainly developed for embedded systems that require real-time and deterministic performance. VxWorks is used in a variety of high-profile applications, including the Mars rovers and various commercial and military aircraft. VxWorks has been successfully used in various industries including military, aerospace, medical, telecommunications, and industrial control systems for over 25 years.  VxWorks supports a wide range of microprocessors like the x86 family, ARM, MIPS, PowerPC, and Free-Scale CPUs, etc.

QNX and VxWorks are two real-time operating systems commonly used in embedded systems. Here are some differences between them:

1. Architecture: QNX is based on a microkernel architecture, while VxWorks is based on a monolithic kernel architecture. This means that QNX has a smaller and more modular kernel, which can make it easier to add and remove features as needed. In contrast, VxWorks has a larger and more complex kernel that provides a wider range of functionality out of the box.
2. Licensing: QNX is proprietary software that requires a license to use, while VxWorks is available under a range of licensing options, including both proprietary and open source.
3. Language Support: QNX supports a wide range of programming languages, including C, C++, Ada, and Java. VxWorks also supports multiple programming languages, but is primarily designed for use with C and C++.
4. Safety Certification: VxWorks is commonly used in safety-critical applications, such as aviation and defense systems, and has been certified to various safety standards, including DO-178B/C. QNX also has some safety certifications, but is not as commonly used in safety-critical applications.
5. Market Share: VxWorks has a larger market share than QNX, particularly in the aerospace and defense industries. QNX is more commonly used in automotive and industrial systems.

It's worth noting that both QNX and VxWorks are highly capable real-time operating systems, and the choice between them often comes down to the specific requirements of the application in question.

Difference between QNX and VxWorks Operating System