Users with "bureaucrat" status can turn other users into sysops (but not remove sysop status), change usernames, and flag and unflag bots accounts. Bureaucrats are created by other bureaucrats on projects where these exist, or by stewards on those who do not yet have one. Sysoppings are recorded in Special:Log/rights or Wikipedia:Bureaucrat log for activity prior to December 24, 2004. Sysoppings by stewards are recorded at Meta:Special:Log/rights but the few stewards who actively sysop users on the English Wikipedia do so using their local bureaucrat status, making this distinction rather academic.
