When I start learning programming at school, i had that first sample program to write, "Hello World!" .
I believe this statement means something. It's like that the software program starts to communicate with the world, its like a new baby crying to announce his arrival to the world.
Software is becoming an essintial part of our modern life, their is no place you cannot find software; in house, workplace, even in your pocket (if you keep your mobile phone in).