241725, 260121, 260521, 261113, 261116, 261121, 270301, 280105 - Other notational signs and symbols, including pH, hazardous materials symbols, degree sign(�), pound sign(#), equal signs(=), and other mathematical symbols. Circles that are totally or partially shaded. Triangles that are completely or partially shaded. Two rectangles. Rectangles touching or intersecting. Rectangles that are completely or partially shaded. Geometric figures forming letters or numerals, including punctuation. Inscriptions in Greek characters, including the following: Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ ς Σ σ Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω.