Since it's such a large number and difficult to comprehend Voyager 1 is about 116 AU away. 1 AU is the distance from earth to the sun (150,000,000 km). Earths circumference is 40,000 km. Space is big.
It makes one truly appreciate and wonder about the amazing accomplishments of this machine (and it's sister, Voyager 2) and the men and women who made this 'grand tour' mission possible.
Sometimes I've wished I was born a few decades earlier so I could have been a part of the team that really pushed mankind's space boundaries and knowledge.
Also, a neat summary of the computers on Voyager can be found here: http://voyager.jpl.nasa.gov/faq.html
I'm still trying to track down the article on the comm used.