1O

1O or 1-O or 1º (the digit "1" and the letter "O") may refer to:

1º Sector, the primary sector of the economy
2017 Catalan independence referendum, called for 1 October 2017, known as 1-O

All pages with titles beginning with 1O
1º de Mayo (disambiguation)
10 (disambiguation) (the digit "1" followed by the digit "0")
I0 (disambiguation) (the letter "I" followed by the digit "0")
IO (disambiguation) (the letter "I" followed by the letter "O")
O1 (disambiguation) (the letter "O" followed by the digit "1")
First officer (disambiguation)
Primo (disambiguation)
Glucogallin, or 1-O-galloyl-beta-D-glucose
Isomalt, or 1-O-alpha-D-glucopyranosyl-D-mannitol
Corilagin, or Beta-1-O-galloyl-3,6-(R)-hexahydroxydiphenoyl-d-glucose

This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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See also