Category:Two letter combinations (proper case)

• Upper- and lower-case pairs‎ (8 C, 10 F)
• Two-letter modern element symbols‎ (101 C)

A

• "Ac" standing for actinium‎ (10 F)
• "Ag" standing for silver‎ (10 F)
• "Al" standing for aluminium‎ (16 F)
• "Am" standing for americium‎ (8 F)
• "Ar" standing for argon‎ (14 F)
• "As" standing for arsenic‎ (7 F)
• "At" standing for astatine‎ (9 F)
• "Au" standing for gold‎ (18 F)

B

• "Ba" standing for barium‎ (7 F)
• "Be" standing for beryllium‎ (15 F)
• "Bh" standing for bohrium‎ (8 F)
• "Bi" standing for bismuth‎ (8 F)
• "Bk" standing for berkelium‎ (9 F)
• "Br" standing for bromine‎ (13 F)
• Belarusian ruble sign‎ (4 F)

C

• "Ca" standing for calcium‎ (20 F)
• "Cd" standing for cadmium‎ (11 F)
• "Ce" standing for cerium‎ (8 F)
• "Cf" standing for californium‎ (9 F)
• "Cl" standing for chlorine‎ (27 F)
• "Cm" standing for curium‎ (8 F)
• "Co" standing for cobalt‎ (13 F)
• "Cr" standing for chromium‎ (13 F)
• "Cs" standing for caesium‎ (10 F)
• "Cu" standing for copper‎ (19 F)

D

• "Db" standing for dubnium‎ (8 F)
• "Ds" standing for darmstadtium‎ (9 F)
• "Dy" standing for dysprosium‎ (7 F)

E

• UIC class Ea railway wagons‎ (6 C)
• UIC class Ec railway wagons‎ (2 C)
• UIC class Ek railway wagons‎ (3 C)
• UIC class El railway wagons‎ (6 C)
• UIC class Em railway wagons‎ (4 C)
• UIC class En railway wagons‎ (6 C)
• UIC class Eo railway wagons‎ (5 C)
• "Er" standing for erbium‎ (7 F)
• "Es" standing for einsteinium‎ (8 F)
• UIC class Es railway wagons‎ (9 C)
• "Eu" standing for europium‎ (7 F)

F

• UIC class Fa railway wagons‎ (11 C)
• UIC class Fb railway wagons‎ (6 C)
• UIC class Fc railway wagons‎ (7 C)
• "Fe" standing for iron‎ (15 F)
• UIC class Ff railway wagons‎ (5 C)
• "Fl" standing for flerovium‎ (7 F)
• UIC class Fl railway wagons‎ (5 C)
• "Fm" standing for fermium‎ (8 F)
• UIC class Fn railway wagons‎ (8 C)
• UIC class Fo railway wagons‎ (8 C)
• UIC class Fp railway wagons‎ (7 C)
• "Fr" standing for francium‎ (11 F)
• UIC class Fr railway wagons‎ (4 C)
• UIC class Fs railway wagons‎ (9 C)

G

• "Ga" standing for gallium‎ (7 F)
• UIC class Ga railway wagons‎ (3 C)
• UIC class Gb railway wagons‎ (6 C)
• "Gd" standing for gadolinium‎ (8 F)
• "Ge" standing for germanium‎ (8 F)
• UIC class Gg railway wagons‎ (4 C)
• UIC class Gk railway wagons‎ (5 C)
• UIC class Gl railway wagons‎ (2 C)
• UIC class Gm railway wagons‎ (1 C)
• UIC class Gq railway wagons‎ (3 C)
• UIC class Gs railway wagons‎ (6 C)
• Gigayear symbol "Gy"‎ (1 F)
• Gray symbol‎ (1 F)

H

• UIC class Ha railway wagons‎ (7 C)
• UIC class Hb railway wagons‎ (9 C)
• UIC class Hc railway wagons‎ (5 C)
• "He" standing for helium‎ (29 F)
• UIC class He railway wagons‎ (2 C)
• "Hf" standing for hafnium‎ (9 F)
• UIC class Hf railway wagons‎ (4 C)
• "Hg" standing for mercury‎ (14 F)
• UIC class Hi railway wagons‎ (10 C)
• UIC class Hk railway wagons‎ (6 C)
• UIC class Hl railway wagons‎ (7 C)
• UIC class Hm railway wagons‎ (3 C)
• UIC class Hn railway wagons‎ (5 C)
• "Ho" standing for holmium‎ (7 F)
• UIC class Hr railway wagons‎ (6 C)
• "Hs" standing for hassium‎ (10 F)
• UIC class Hs railway wagons‎ (12 C)

I

• UIC class Ia railway wagons‎ (4 C)
• UIC class Ib railway wagons‎ (5 C)
• UIC class Ic railway wagons‎ (4 C)
• UIC class Ih railway wagons‎ (4 C)
• "In" standing for indium‎ (8 F)
• UIC class Ip railway wagons‎ (4 C)
• UIC class Iq railway wagons‎ (7 C)
• "Ir" standing for iridium‎ (9 F)
• UIC class Ir railway wagons‎ (5 C)
• UIC class Is railway wagons‎ (7 C)

K

• UIC class Kb railway wagons‎ (4 C)
• UIC class Kk railway wagons‎ (3 C)
• UIC class Kl railway wagons‎ (3 C)
• Misspelled "Km" instead of "km"‎ (39 F)
• UIC class Km railway wagons‎ (5 C, 1 F)
• UIC class Ko railway wagons‎ (3 C)
• UIC class Kp railway wagons‎ (3 C)
• "Kr" standing for krypton‎ (10 F)
• UIC class Ks railway wagons‎ (11 C, 3 F)

L

• "La" standing for lanthanum‎ (8 F)
• UIC class La railway wagons‎ (12 C)
• UIC class Lb railway wagons‎ (1 C)
• UIC class Lc railway wagons‎ (1 C)
• UIC class Ld railway wagons‎ (4 C)
• UIC class Le railway wagons‎ (4 C)
• UIC class Lf railway wagons‎ (5 C)
• UIC class Lg railway wagons‎ (2 C)
• "Li" standing for lithium‎ (16 F)
• UIC class Li railway wagons‎ (2 C)
• UIC class Lk railway wagons‎ (3 C)
• UIC class Lo railway wagons‎ (5 C)
• "Lr" standing for lawrencium‎ (8 F)
• UIC class Lr railway wagons‎ (3 C)
• UIC class Ls railway wagons‎ (9 C)
• "Lv" standing for livermorium‎ (5 F)

M

• "Mc" standing for moscovium‎ (6 F)
• "Md" standing for mendelevium‎ (8 F)
• "Mg" standing for magnesium‎ (19 F)
• "Mn" standing for manganese‎ (5 F)
• "Mo" standing for molybdenum‎ (9 F)
• "Mt" standing for meitnerium‎ (7 F)

N

• "Na" standing for sodium‎ (23 F)
• "Nb" standing for niobium‎ (8 F)
• "Nd" standing for neodymium‎ (10 F)
• "Ne" standing for neon‎ (10 F)
• "Nh" standing for nihonium‎ (12 F)
• "Ni" standing for nickel‎ (16 F)
• "No" standing for nobelium‎ (8 F)
• "Np" standing for neptunium‎ (11 F)
• Numero sign‎ (3 C, 29 F)

O

• "Og" standing for oganesson‎ (7 F)
• "Os" standing for osmium‎ (10 F)

P

• "Pa" standing for protactinium‎ (7 F)
• "Pb" standing for lead‎ (12 F)
• "Pd" standing for palladium‎ (14 F)
• "Pm" standing for promethium‎ (6 F)
• "Po" standing for polonium‎ (14 F)
• "Pr" standing for praseodymium‎ (7 F)
• "Pt" standing for platinum‎ (12 F)
• "Pu" standing for plutonium‎ (9 F)

R

• "Rb" standing for rubidium‎ (9 F)
• UIC class Rb railway wagons‎ (1 C)
• UIC class Rc railway wagons‎ (2 C)
• "Re" standing for rhenium‎ (4 F)
• UIC class Re railway wagons‎ (4 C)
• "Rf" standing for rutherfordium‎ (10 F)
• "Rg" standing for roentgenium‎ (10 F)
• UIC class Rg railway wagons‎ (4 C)
• "Rh" standing for rhodium‎ (11 F)
• Rh blood group system‎ (8 C, 6 F)
• UIC class Rh railway wagons‎ (3 C)
• UIC class Ri railway wagons‎ (4 C)
• UIC class Rl railway wagons‎ (7 C)
• UIC class Rm railway wagons‎ (6 C)
• "Rn" standing for radon‎ (10 F)
• UIC class Rn railway wagons‎ (6 C)
• UIC class Ro railway wagons‎ (4 C)
• UIC class Rp railway wagons‎ (3 C)
• UIC class Rs railway wagons‎ (14 C, 4 F)
• UIC class Rt railway wagons‎ (1 C)
• "Ru" standing for ruthenium‎ (9 F)
• UIC class Rz railway wagons‎ (1 C)

S

• UIC class Sa railway wagons‎ (5 C)
• "Sb" standing for antimony‎ (7 F)
• "Sc" standing for scandium‎ (8 F)
• UIC class Sc railway wagons‎ (2 C)
• UIC class Sd railway wagons‎ (6 C)
• "Se" standing for selenium‎ (7 F)
• UIC class Sf railway wagons‎ (10 C)
• "Sg" standing for seaborgium‎ (8 F)
• UIC class Sg railway wagons‎ (8 C)
• UIC class Sh railway wagons‎ (6 C)
• "Si" standing for silicon‎ (8 F)
• UIC class Si railway wagons‎ (8 C)
• UIC class Sk railway wagons‎ (7 C)
• UIC class Sl railway wagons‎ (5 C)
• "Sm" standing for samarium‎ (6 F)
• UIC class Sm railway wagons‎ (14 C)
• "Sn" standing for tin‎ (9 F)
• UIC class Sn railway wagons‎ (10 C)
• UIC class Sp railway wagons‎ (7 C)
• "Sr" standing for strontium‎ (8 F)
• UIC class Sr railway wagons‎ (7 C)
• UIC class Ss railway wagons‎ (14 C)
• UIC class St railway wagons‎ (1 C)

T

• "Ta" standing for tantalum‎ (8 F)
• UIC class Ta railway wagons‎ (8 C)
• "Tb" standing for terbium‎ (7 F)
• "Tc" standing for technetium‎ (7 F)
• UIC class Tc railway wagons‎ (1 C)
• UIC class Td railway wagons‎ (9 C, 1 F)
• "Te" standing for tellurium‎ (12 F)
• UIC class Tg railway wagons‎ (5 C)
• "Th" standing for thorium‎ (9 F)
• "Ti" standing for titanium‎ (9 F)