SharePoint, one of the most loved and widely adopted product of Microsoft turns 18 years today (March 18th 2019).
Since this historical product was officially started as SharePoint Portal Server in 2001, its now 18 years old full grown mature product which still dominates the global enterprise market as Microsoft keeps shipping undeniably innovative features very frequently.
SharePoint Portal Server 2001
SharePoint Online In 2019
This article with the entire history briefed nicely by Microsoft’s Bill Baer is so fascinating to read – https://blogs.technet.microsoft.com/wbaer/2015/02/12/the-sharepoint-journey/
Microsoft Cloud Infrastructure Technical Journal 