00

30, or double zero, may refer to:

• The year 1900
• The year 2000
• The year 2100
• 00 Agent, an agent with a license to kill in the James Bond media
• 00 gauge, a standard of model railways
• Size 00, a women's clothing size in the US catalog sizes system
• Symphony No. 00 (Bruckner), an alternate name for Anton Bruckner's Study Symphony orchestra in F minor
• Mobile Suit Gundam 00, an anime series
• 00, an abbreviation used on signs to indicate a public toilet (particularly in Germany and Eastern Europe)
• 00, a common international call prefix
• 00, a wire diameter defined by the American wire gauge standard
• 00, a fine grade of steel wool
• 00, a field on the wheel of some roulette game tables
• 00, an Italian type number for Flour
• A shotgun ammunition size for buckshot, about equal to 8.452 mm (0.33 inches) in diameter
• "Double Zeros" (Runaways), a TV episode
• Double Zero Records, a record label

See also

• Zero Zero (disambiguation)
• Double O (disambiguation)
• 0 (disambiguation)
• 0-0 (disambiguation)
• 00s (disambiguation)
• OO (disambiguation)
• 0O (disambiguation)
• O0 (disambiguation)
• Leading zero