https://en.m.wikipedia.org/wiki/Choronzon

https://en.m.wikipedia.org/wiki/Corona_Borealis

https://en.m.wikipedia.org/wiki/Hercules%E2%80%93Corona_Borealis_Great_Wall

https://en.m.wikipedia.org/wiki/Chronos

https://en.m.wikipedia.org/wiki/Omicron

https://en.m.wikipedia.org/wiki/Omicron_Persei

https://en.m.wikipedia.org/wiki/Omicron_Andromedae

https://en.m.wikipedia.org/wiki/Oncomir

https://en.m.wikipedia.org/wiki/Big_O_notation

https://en.m.wikipedia.org/wiki/Micrometre

https://en.m.wikipedia.org/wiki/Oncovirus

https://en.m.wikipedia.org/wiki/Omicron_Islands

https://en.m.wikipedia.org/wiki/Omega_Island

https://en.m.wikipedia.org/wiki/Lambda_Island

https://en.m.wikipedia.org/wiki/Falkland_Islands

..

Big O notation is useful when analyzing algorithms.

Big O can also be used to describe the error term in an approximation to a mathematical function.

There are two formally close, but noticeably different, usages of this notation:

infinite asymptotics
infinitesimal asymptotics