When a nuclide has more than one decay mode, coloured triangles give rough indications of the branching ratios of each mode. (a) The large triangles, introduced in the first edition, in the left I 126 box, indicate branching ratios above 5%. The decay modes are listed in the order of decreasing branching ratios. (b) The small triangle, introduced in the second edition, in the nuclide box (Tc 100) indicates a branching ratio below and/or equal to 5%. (c) The green colour was introduced in the third edition to indicate spontaneous fission (Cf 254).