O

• Octonions(1 C, 13 P)

Q

• Quaternions(2 C, 33 P)

S

• Sedenions(4 P)

• Hypercomplex number

A

• Applications of dual quaternions to 2D geometry

B

• Bicomplex number

C

• Cayley–Dickson construction

D

• Dual number

G

• Grassmann number

H

• Hurwitz's theorem (composition algebras)
• Hypercomplex analysis

L

• Laguerre transformations

M

• Multicomplex number

P

• Pauli matrices

S

• Split-complex number

T

• Trigintaduonion