0-4-0+0-4-0 (plural 0-4-0+0-4-0s) Under the Whyte notation system, a Garratt-type locomotive that is articulated in three parts, with a boiler mounted...
0-4-0 (plural 0-4-0s) Under the Whyte notation system, the simplest form of steam locomotive, with two axles and four driving wheels, and no leading wheels...
English Wikipedia has an article on: 0-4-4-0 Wikipedia 0-4-4-0 (plural 0-4-4-0s) Under the Whyte notation system, a Mallet, Meyer, or Fairlie-type locomotive...
4-4-0 (plural 4-4-0s) Under the Whyte notation system, a steam locomotive that has four leading wheels on a leading truck followed by two sets of coupled...
2-4-0 (plural 2-4-0s) Under the Whyte notation system, a steam locomotive that has two leading wheels followed by two sets of coupled driving wheels, and...