Janes World Railways (JWR) provides details on railway systems and operators, manufacturers of equipment, technology and services, and consultancy associations.
In updating the content, Janes conducts detailed literature and data searches, reviewing thousands of open source documents and data sources produced by governmental and non-governmental organisations, private businesses, and academic institutions.
The publication offers railway profiles with detailed data covering operators and systems in nearly 140 countries, plus information on 2,000 manufacturers, suppliers and service companies.
[citation needed] Its covers detail analysis and information on following sections: Equipment: Data & Technology Contact Information The World Railways Yearbook 17/18 issue costs over US$1320.
The yearbook contains many maps of railway systems, which since about 1990 have been redrawn in a consistent style.