An organization is like a human. It has a birth, evolves through various phases.
In the course of its journey ,there are a number of lessons learnt and a few un-learnt as well.
All these will be milestones for the organization.

What is so great about them? 
To what purpose should we document them and keep looking at them time and again?.

Reviewing or revisiting the milestones from time to time-
  Evokes nostalgic memories some times,
   Some times produce a spike of energy and motivates to do more
   and some times, even a sense of remorse engulfs..!

Here are our milestones that we can look back with pride as most of the milestones are achievements rather than just evolutionary occurrences.....!