• 2000s introductions (30 C, 3 P)
• 2010s introductions (32 C, 2 P)
• 2020s introductions (25 C)

0–9

• 21st-century inventions (1 C, 22 P)

A

• Amusement park attractions introduced in the 21st century (26 C)

B

• 21st-century ballets (3 C)
• 21st-century board games (3 C)

C

• Camera lenses introduced in the 21st century (19 C)
• Cameras introduced in the 21st century (24 C)
• 21st-century card games (3 C)
• 21st-century comics debuts (5 C)
• Computer-related introductions in the 21st century (7 C)

F

• Fictional characters introduced in the 21st century (4 C)
• Fictional elements introduced in the 21st century (3 C)
• Flags introduced in the 21st century (25 C)
• Food and drink introduced in the 21st century (3 C)

G

• Games and sports introduced in the 21st century (6 C)

M

• Mass media franchises introduced in the 21st century (5 C)
• Mobile phones introduced in the 21st century (28 C)

N

• 21st-century neologisms (4 C, 8 P)

P

• Products introduced in the 21st century (36 C, 2 P)
• Publications established in the 21st century (7 C)

Q

• 21st-century quotations (3 C)

R

• 21st-century robots (3 C, 2 P)
• 21st-century role-playing games (3 C, 29 P)

S

• 21st-century software (5 C, 1 P)
• Symbols introduced in the 21st century (3 C)

T

• Telecommunications-related introductions in the 21st century (3 C)
• Typefaces and fonts introduced in the 21st century (3 C, 1 P)

V

• Vehicles introduced in the 21st century (10 C)
• 21st-century video games (29 C)

W

• Weapons and ammunition introduced in the 21st century (24 C, 1 P)
• Writing systems introduced in the 21st century (3 C, 1 P)

A

• Art Recognition

C

• Code Camp

J

• Juliet Marine Systems Ghost

S

• Selfie museum
• Selfie studio
• Sensor journalism
• Statue of Stepan Charnetskyi, Shmankivtsi