Every character has a story.
Unicode block
Miscellaneous Mathematical Symbols-B
128 in block
U+2980
U+2981
U+2982
U+2983
U+2984
U+2985
U+2986
U+2987
U+2988
U+2989
U+298A
U+298B
U+298C
U+298D
U+298E
U+298F
U+2990
U+2991
U+2992
U+2993
U+2994
U+2995
U+2996
U+2997
U+2998
U+2999
U+299A
U+299B
U+299C
U+299D
U+299E
U+299F
U+29A0
U+29A1
U+29A2
U+29A3
U+29A4
U+29A5
U+29A6
U+29A7
U+29A8
U+29A9
U+29AA
U+29AB
U+29AC
U+29AD
U+29AE
U+29AF
U+29B0
U+29B1
U+29B2
U+29B3
U+29B4
U+29B5
U+29B6
U+29B7
U+29B8
U+29B9
U+29BA
U+29BB