"A passenger car (known as a coach or carriage in the UK, and also known as a bogie in India) is a piece of railway rolling stock that is designed to carry passengers. The term passenger car can also be associated with a sleeping car, baggage, dining, railway post office and prisoner transport cars.
In some countries, such as the UK, some coaching stock (whether designed, converted or adapted) to not carry passengers are referred to as "NPCS" ( non-passenger coaching stock); similarly some maintenance (engineering) stock can be known as "MOW" – maintenance of way – in the US." - (en.wikipedia.org 02.05.2020)
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