What is the difference between a bee and a wasp?

What is the difference between a bee and a wasp? I know that generally bees are nice than wasps, and that once a bee stings something, it dies while a wasp can sting as many times as it wants. Are there any other differences between the two? Also, is there are differences in appearance to distinguish the two creatures? Ahh ... I hate them both!

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).