4000

4000 or variation, may refer to:

• 4000 (number)
• 4000 BCE, a year in the 4th millennium BC
• A.D. 4000, the last year of the 4th millennium CE, a century leap year starting on Saturday
• 4000s AD, a decade, century, millennium in the 5th millennium CE
• 4000s BCE, a decade, century, millennium in the 5th millennium BC
• 4000 Hipparchus, an asteroid in the Asteroid Belt, the 4000th asteroid registered
• Mobro 4000, a barge operated by MOBRO
• Weather Star 4000, a computer system used to display local forecasts on The Weather Channel
• Hawker 4000, a supermidsized businessjet
• Delta 4000, a rocket series
• Audi 4000, a compact executive sedan
• 4000 (District of Shkodër), one of the postal codes in Albania
• 4000-series integrated circuits