65,535 - that is the limit of unique TCP/IP ports that's currently allowed on most systems (since port number is a 16-bit integer value) If multiple currencies overlap in port numbers, or if future coins use some other mechanism to connect to their peer networks you could always have more, .
In 2007, its founders were ranked as the second most generous philanthropists in America, and Warren Buffett the first. As of May 16, 2013, Bill Gates had donated US$28 billion to the foundation.
A: According to Forbes magazine's 2014 rankings of the world's billionaires, Bill Gates has a net worth of approximately  $76 billion. This is up $9 billion from the previous year due to a bounce in Microsoft shares and has earned him the honor of being the richest person in the United States and in the world.