| 1. | It was developed by Microsoft Incorporation. | It was developed by QNX Software Systems. |
| 2. | It was launched in 1985. | It was launched in 1982. |
| 3. | It is owned by Microsoft Incorporation. | It is owned by Blackberry Limited. |
| 4. | Its target systems types are workstation, personal computers, media center, tablets and embedded systems. | Its target system types are automotive, medical, smartphones, consumer, industrial, embedded systems and safety. |
| 5. | Computer architectures supported by Windows are IA-32, x86-64, IA-64, ARM, Alpha, MIPS and PowerPC. | Computer architectures supported by QNX are x86, SH-4, PowerPC, ARM and MIPS. |
| 6. | Its kernel type is Hybrid with modules. | Its kernel type is Microkernel. |
| 7. | Its native APIs are Win32 and NT API. | Its native APIs are POSIX and Java. |
| 8. | It has the preferred license Proprietary and Source available. | It has the preferred license of Proprietary. |
| 9. | The non-native APIs supported through its subsystems are DOS API, Win16, POSIX and .NET. | The non-native APIs are not supported through its subsystems. |
| 10. | File systems supported by Windows are NTFS, FAT, ISO 9660, UDF, HFS+, FATX and HFS. | File systems supported by QNX are QNX4FS, QNX6, ext2, FAT, ISO 9660, Joliet, NFS, CIFS, ETFS, UDF, HFS, HFS+ and NTFS. |