Hi there.

Picture in your mind a world, a universe, an Earth, in which there is NO advanced electronics-based technology of any kind, or, where there are machines and mechanical devices, but, there are no computers, up to a certain technology level point. And yet, in this same world, people have space and even interstellar star travel, advanced alloys, metals, and materials (such as metals and alloys that have the hardness and strength of steel and greater than steel, but, with the flexibility of plastics/polymers), and other things. How could such a world function? 

One idea I have is what we see in the fictional "Dune" universe that came from Frank Herbert. In there, the humans once had very advanced artificial intelligences, nanotechnology, and star travel. The machine intelligences took over and began to mass murder humans, the humans fought back, and won, and then banned all "Thinking Machines". They discovered a substance called the Spice Melangue that allowed those who consumed it to have minds that could perform the complex calculations needed for interstellar navigation. In the absence of such a fictional substance, could a civilization have star travel without advanced computers or not?

I didn't find the right solution from the internet.
References:

http://www.spyderco.com/forumII/viewtopic.php?t=76785

Corporate Promotional Video