Similar to 1931年ノルディックスキー世界選手権

Douglas D-558-2 Skyrocket

Obice da 210/22

Cannone da 75/27 modello 06

Cannone da 75/27 modello 11

Cannone da 75/32 modello 37

Darwin Information Typing Architecture

Dasher (software)

Data Encryption Standard

German Equipment Works

Belyayev DB-LK

Dbx (noise reduction)

Douglas DC-1

Douglas DC-4E

Douglas DC-7

JNR Class DE10

DEC Alpha

DECnet

1931 German football championship

Hoover Moratorium

Second Brüning cabinet

1931 in sports

1931 Australian Championships

1930 Emperor's Cup

1931 Hawke's Bay earthquake