The .biz domain, operated by NeuLevel, Inc., is restricted to businesses.
The .com domain, operated by VeriSign Global Registry Services, is a generic top-level domain originally intended for commercial businesses around the world.
The .info domain, operated by Afilias Limited, is an unrestricted domain for websites containing information about you, your organization, your products or any other information you'd like to make available to a global audience.
The .name domain, operated by Global Name Registry, is reserved for individuals.
The .net domain, operated by VeriSign Global Registry Services, is a generic top-level domain used by many types of organizations and individuals globally; it was historically intended for and is still commonly used by Internet service providers.
The .org domain, operated by Public Interest Registry, is unrestricted, but was intended to serve the noncommercial community.
The .pro domain, operated by RegistryPro, is restricted to certified professionals and related entities.
That's very true.
In practice the intended use doesn't mean anything anymore, the only hurdles are the legal requirements, but I think there aren't any for those you mentioned.
And even then, you might just getaway providing a local address.
Instead, from a marketing point of view, they make a lot of difference!