Domain names can be divided into three categories of domain extensions:  Generic top-level domains (gTLDs): These domains are the most common and are listed in the table below. They include .com, .net, .org, .biz and others. gTLDs can be registered by anyone in the world. Country code top-level domains (ccTLDs): These domains include the two-letter country codes for each country (for example, .ke for Kenya, .ca for Canadian domains, .uk for UK domains, .cn for Chinese domains, and so on).  Sponsored top-level domains (sTLDs): These are new domain names that are not part of the regular top-level domain system and are commonly sponsored by organizations. Examples include .mobi (for mobile devices), .name (for individuals) and .pro (for professionals). Others include .gov (used by the US government), .edu (used by post-secondary institutions.)