The systems used today all developed in the latter half of the 19th century.

Scotland's heavy industry began to develop in the second half of the 18th century.

The industry developed a lot in the second half of the 19th century.

The university English departments began developing in the first half of the twentieth century.

The street began to develop rapidly in the second half of the 19th century.

New potatoes, which developed rapidly in the second half of the 19th century.

It developed into an important form of program music in the second half of the 19th century.

Quednau developed into a garden town in the first half of the 20th century.

It started to develop in the second half of the 19th century.

That developed in the second half of the 20th century and particularly towards the end.