History of Microsoft Excel [Videos]

[Update: Excel turned 25 a few days ago!]

Office - Excel is one the most awesome piece of softwares ever written. Here is its history -

Part I:

[youtube http://www.youtube.com/watch?v=ZodlyeiQeIo]

Part II:

[youtube http://www.youtube.com/watch?v=D2PgYGK85lI]