When did Microsoft stop bundling Microsoft Office into the operating system?

I think Microsoft started with only word,excel and powerpoint as a bundl of the windows I was child I still remember it1990s

Just when they realized that Microsoft Office is more valuable that its operating system!

I agree with Zaid Mahadin, Office has never been packaged with the operating system.

Office was never a part of the OS. Microsoft got a lot of legal heat in the US & Europe over bundling Internet Explorer in the OS.

Ms office never exist before until Window come they created it but not a part of Microsoft office 

It was when Windows3.1 and3.11 was introduced wordpad and notepad were bundle of windows. But MS-Office is individual package.