... with regards to Microsoft as a whole, including, its employees, customers, etc. etc.
The past, because learning from it is a, well, good thing.
The future, the ability (vision) to judge what lies ahead more accurately, and thus navigate the sometimes rough seas of business.
The present, the understanding that here and now is what your (er..
my for this example) company is all about! Because you can talk a good game, but when it comes right down to it...
the present is what everyone sees!