DOI stands for Digital Object Identifier. It is used to identify internet content, and is also used to link to that content when needed.
Because Adolph Hitler was a Doi-doi-doi.
An elephant. Doi doi
Because they felt like it. DOI DOI
Tōru Doi was born in 1958.
The population of Choeng Doi is 10,750.
Hiroaki Doi was born in 1978.
Michiyoshi Doi died in 1975.
Takeo Doi died in 2009.
Masaki Doi was born in 1960.
Ryuichi Doi was born in 1939.
Toshiyuki Doi was born in 1978.
Doi - retailer - ended in 2003.