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.
The fight against Ebola has found a deep-pocketed ally in Bill Gates. The billionaire philanthropist's foundation has pledged $50 million to fight the viral outbreak in West Africa, according to a statement by the organization.