What Is Owin? How Does It Relate To Web?

.NET is Microsoft Specific which is likewise featuring inward roughly Open source projects. Believe me it is true, read here:

https://opensource.com/business/14/11/microsoft-dot-net-empower-open-source-communities

'Microsoft is providing the sum .NET server stack inward opened upward source, including ASP.NET, the compiler, the .NET Core Runtime, Framework in addition to libraries, enbaling devvelopers to fix alongside .NET across Windows, Mac or Linux'.

This is former story, since 2004 the 'mono project' was a opened upward source implementation of .NET platform.

Now coming to OWIN, which is brusk for Open Web Interface for .NET OWIN) defines a touchstone interface betwixt .NET spider web servers in addition to spider web applications.

You tin abide by everything you lot desire to know most OWIN hither at this primary site.
http://owin.org/

These are roughly of OWIN compatible projects:
Servers in addition to Hosts
    Katana
    Nowin
    Suave
Frameworks
    Jasper
    Nancy
    SignalR
    WebApi
    WebSharper
    DuoVia.Http
    Simplify.Web
    Wisej
Implementations
    Katana
    Freya
    ASP.NET vNext

Microsoft uses OWIN for edifice ASP.NET Single-Page applications in addition to several of the assemblies used are OWIN based every bit shown here:

MicrosoftOwinAssmeblies.png