In a distributed database system, a program often referred to as the database's back end runs constantly on a server, interpreting data files on the server as a standard relational database. Programs on client computers allow users to manipulate that data, using tables, columns, rows, and fields.
A solar energy system big enough to power a computer and a few other small items might cost you about $700 to $1000. These are also well suited for RVs, boats and camping. Learn more about portable solar energy units.
Solar power is a clean, renewable energy source, yet it makes up less than 1 percent of the power used in the United States [source: USA Today]. Part of the reason more people aren't using solar energy to power their homes is the cost. Solar panels can cost $30,000 or more to install, an investment that can take 10 to 15 years to recoup [sources: Live Science, CNET News, Walsh].