There are many types of domains having different types of extensions. such as:--

1) .com

2) .net

3) .org

4) .biz

5) .info

6) .co.uk

7) .org.uk

8) .me.uk

9) .com

1) .net = It is mainly used internet service provider.

2) .org = It is used mainly by non commercial organization.

3) .biz = It is mainly used for business purposes.

4) .info = It is mainly used for site that are mainly designed for provide any helpful resource. whether it is commercial or non-commercial.

5) .co.uk = It is mainly used for businesses.

6) .org.uk = It is mainly used for non-commercial organization.

7) .me.uk = This extension is mainly used for personal use.

8) .com = It is used for general purposes.