Part of the Operating systems glossary: Mac OS is the computer operating system for Apple Computer's Macintosh line of personal computers and workstations. A popular feature of its latest version, Mac OS X, is a desktop interface with some 3-D appearance characteristics.
The Preakness Stakes is an American flat thoroughbred horse race held on the third Saturday in May each year at Pimlico Race Course in Baltimore, Maryland. It is a Grade I race run over a distance of 9.5 furlongs (13â16 miles (1,900 m)) on dirt.
Secretariat, left, races toward a record win in the Kentucky Derby on May 5, 1973, at Churchill Downs in Louisville, Kentucky. 1  Officials rule that 1973 winner is Preakness record-holder. 2  The official time of 1:54 2/5 was disputed by independent timers.  Using video evidence commission revises time to 1:53 flat.