How to locate people online?

In old days there were very few ways in which people could locate their long lost buddies or email their friends but that is changing now. Because with the emergence of search engines all over the internet. Most of the information is being indexed, that makes that information searchable and visible on the internet.
Though all that information cannot help to locate a long lost friend or an ex girlfriend. But there are some ways in which people can do it; also some conditions apply to the methods that are...
1. The person you are searching for needs to have a correct email address.
2. He (person) must have made an account somewhere on the internet or his name should be mentioned on any website.
These are some of the search engines that are used to find information about people on the servers.
They are:
1. Google Search Engine:
The Google search engine is used for the vast amount of searches, these searches can be from 'how to' to another variable question.
People also search other people on the search engine to find information related to them, Google is most popular search engine that's why most people do not think to use any other search engine. Though Google has its own side effects, but people do not believe about the side effects. Till their work is going well and they are finding information, it抯 not of their concern.
2. Zabasearch: This search engine was made to search people who live in the USA. I myself tried it and its accurate till now, the search engine tells about the address, phone number and email address.
3. Pipl: This search engine is just like zabasearch but it's much more accurate in a way that it also shows the picture of people based on the query.
4. Cvgadget: This search engine searches for queries (names of people) all over the internet and in some of the major social networking sites.
5. 123people: 123people is a website that checks data from different sources on internet. Mainly the website checks databases and other portals. Then shows the results in a categorized form with address, mail, number and much more.
These are few of the search engines by which we can acquire information about people.
Writer is currently exploring new ways to track people online and is working in logo online pros, a company that makes modern logos in modern times and sells custom logo designs for customized people, which are made by its photography logo designers.