At the end of 2011, microsoft's® operating
systems (e. g., windows®) were on more than
90% of the world's computers. as a consumer, do
you think this is a good thing?

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.

the legislative branch is formed by the house of representatives and the senate .