Letterlike Symbols
℗     sound recording copyright, (P)
℠     service mark, SM
™ ™ trademark sign (TM)
℘ ℘ script capital P = power set = Weierstrass p, U+2118 ISOamso
ℑ ℑ blackletter capital I = imaginary part, U+2111 ISOamso
ℜ ℜ blackletter capital R = real part symbol, U+211C ISOamso
ℵ ℵ alef symbol = first transfinite cardinal, U+2135 NEW (alef symbol is NOT the same as hebrew letter alef, U+05D0 although the same glyph could be used to depict both characters)