The .com, .info, .net, .org, and .ws TLDs are globally available and unrestricted.
Traditionally, however, names in .net have been used by organizations involved in Internet infrastructure activities - typically ISPs (Internet Service Providers) - while .org is frequently used by noncommercial organizations. .biz is available to businesses only. Albeit unrestricted, usage of the .info TLD implies that the site content is of a primarily informative nature.