Difference between Windows and Plan 9

1. Windows :
Windows is a group of various proprietary graphical operating systems which is provided by Microsoft Incorporation. It is also known as Microsoft Windows. It currently includes Windows NT and Windows IoT as members of its family. Earlier it included Windows 9x, Windows Mobile and Windows Phone which are no longer in use. It is the most used operating system in personal computers. The first version of Windows was launched by Microsoft in 1985. It has hybrid kernel with modules.

2. Plan 9 :
Plan 9 is a distributed operating system which was developed by Bell labs. It was created at Computer Science Research Center (CSRC) at Bell Labs. It is a free operating system. It is written in Dialect of ANSI C. Its target systems are Workstation, server, embedded systems and HPC. It is an Unix-like operating system. It is an open source operating system. The first version of Plan 9 was launched in 1993. Its kernel type is hybrid with user space file systems.

Difference between Windows and Plan 9 :

S.No.	WINDOWS	PLAN 9
1.	It was developed by Microsoft Incorporation.	It was developed by Bell Labs.
2.	It was launched in 1985.	It was launched in 1993.
3.	Its target systems types are workstation, personal computers, media center, tablets and embedded systems.	Its target system types are workstation, server, embedded and HPC.
4.	Computer architectures supported by Windows are IA-32, x86-64, IA-64, ARM, Alpha, MIPS and PowerPC.	Computer architectures supported by Plan 9 are IA-32, Alpha, MIPS, PowerPC and SPARC.
5.	Its kernel type is Hybrid with modules.	Its kernel type is Hybrid with user space like systems.
6.	Its native APIs are Win32 and NT API.	Its native APIs are Proprietary (Unix-like).
7.	It has the preferred license Proprietary and Source available.	It has the preferred license of LPL.
8.	The non-native APIs supported through its subsystems are DOS API, Win16, POSIX and .NET.	The non-native APIs supported through its subsystems are POSIX compatibility layer.
9.	Its package management is MSI or custom installer.	Its package management is none.
10.	Its update management is Windows Update.	Its update management is replica.
11.	File systems supported by Windows are NTFS, FAT, ISO 9660, UDF, HFS+, FATX and HFS.	File systems supported by Plan 9 are fossil/venti, 9P2000, kfs, ext2, FAT and ISO 9660.