Category:1 (number)

• 1 (computing)

0

• 0.999... (computing)

E

• Empty product (computing)

G

• Grandi's series (computing)

H

• Hapax legomenon (computing)

I

• Identity element (computing)
• Identity function (computing)
• Identity matrix (computing)

L

• Legendre's constant (computing)

M

• Matrix of ones (computing)
• Monogon (computing)

N

• −1 (computing)
• Normalizing constant (computing)

O

• One-dimensional space (computing)
• One-dimensional symmetry group (computing)
• One-form (computing)
• One-parameter group (computing)

P

• Unipedalism (computing)
• Plane unit angle (computing)
• Principal root of unity (computing)

R

• Root of unity (computing)

S

• Singleton (mathematics) (computing)
• Solid unit angle (computing)

T

• Turn (angle) (computing)
• Turn (geometry) (computing)

U

• Unary numeral system (computing)
• Uniqueness quantification (computing)
• Unit (ring theory) (computing)
• Unit angle (computing)
• Unit ball (computing)
• Unit circle (computing)
• Unit cube (computing)
• Unit disk (computing)
• Unit fraction (computing)
• Unit function (computing)
• Unit hyperbola (computing)
• Unit impulse (computing)
• Unit interval (computing)
• Unit length (computing)
• Unit plane angle (computing)
• Unit set (computing)
• Unit solid angle (computing)
• Unit sphere (computing)
• Unit square (computing)
• Unit vector (computing)